文档库 最新最全的文档下载
当前位置:文档库 › GMDSS通信英语完整题库

GMDSS通信英语完整题库

GMDSS通信英语完整题库
GMDSS通信英语完整题库

第一部英语听力习题

1.Utopia Forward Station. This is Utopia Bridge. Single up forward to head line and breast

line.

Utopia船首台,我是驾驶台,请单绑,只剩头缆和横缆。

2.Utopia Aft Station. This is Utopia Bridge. Single up aft to breast line and stern buoy line.

Utopia船尾台,我是船首台,请单绑,只剩横缆和尾浮筒系缆。

3.Utopia Aft Station. Take tug’s towing line to capstan then make fast on starboard quarter.

Utopia船尾台,请把拖轮拖缆带上绞缆机并在右舿挽牢。

4.Oredock Pilot. This is Huanghe. My draught forward 10.2m, aft 11.0m, fresh water

allowance 200 millimeters.

Oredock引航员,我是黄河轮,我船首吃水为10,2米,尾吃水为11米,淡水限额为200毫米

5.Gargantua. This is Utopia. Visibility is expected to decrease to 200m in four hours.

Gargantua,我是Utopia,预计四小时后能见度将下降到200米。

6.Euphoria. This is Red Sea. Visibility at Diexieville is 500 meters. It is expected to increase

to 1500 meters in the next two hours.

Euphoria,我是Red Sea,在Diexieville处的能见度为500米,预计两小时后将增加到1500米。

7.Oilport Pilot. This is Yellow Sea. Is pilotage compulsory?

是强制引航吗?

8.Ioland. This is M/V Blue Eagle. My anchor is foul

我的锚链绞缠住了。

9.Oilport pilot. This is Utopia. Pilot ladder is rigged on starboard side.

引航员用梯已在右舷挂好。

10.Yellow Drill. This is Appleport Pilot. Pilot vessel is approaching you.

引航船正向你处驶来。

11.Yellow Sea. This is Dalianport Pilot. Pilotage suspended for all vessels.

所有船舶暂停引航。

12.Gargantua. This is Utopia. I am coming to your assistance and expected to reach you at 1800

hours.

我将前来援助你船,预计抵达时间为18点。

13.Utopia. Are you ready for helicopter?

准备好接受直升飞机的援助了吗?

14.Roger. I am making identification signal.

我船正在发出识别信号。

15.Bigapple. This is helicopter. Request permission to land on deck.

直升飞机请求允许在甲板上降落。

16.Utopia. this is Fantasia. There is a vessel anchored ahead of you in the center of fairway .

航道中心你前方有船抛锚。

17.Nutcracker. This is Newharbour Pilot. There is a vessel ahead obstructing your movement.

前方有船会阻碍你船行动。

18.There is a swell of height 8 meters from seaward.

从海面过来一个米高的涌浪。

19.Blue flag. This is Red Star. Are sea conditions expected to change within the next three

hours?

海上条件预计在3小时后有所改变吗?

20.Newharbour. This is Utopia. I will stop engines.

我船将关闭发动机。

21.Watertrees. This is Angro Merchant. You are running into danger. Risk of collision imminent.

Advise you alter course 90°to starboard.

你船有碰撞危险,建议向右舷更改航向90度。

22.World Fisher. This is Androclea. I will maintain present course and speed.

我将保持现在的航向和航速。

23.Avonport Pilot. This is Euphoria. At what time will pilot be available?

何时能得到引航。

24.Valhalla. This is Red Flag. No. 4 beacon is 2 miles distance ahead.

4号信位标在前方2英里。

25.Avonport Port Control. This is Utopia. Is there any other traffic outward?

是不是有另外的出港船只。

26.Avonport. Dockmaster. This is Utopia Pilot. Is vessel in position?

船只是否就位。

27.Utopia. This is St. Nicholas Strait Information Service. Traffic lane Bravo is blocked. Traffic

has been diverted to traffic lane Charlie.

Bravo航道已关闭,航行转移到Charlie航道。

28.Worrld Fisher. This is Utopia. You are approaching a prohibited fishing area.

你正驶往一个禁渔区。

29.World Fisher. This is Blue Boy. Fishing gear has fouled your propeller.

渔具缠绕在你的螺旋桨上。

30.World Fisher. Fishing in this area is prohibited. Advise you recover your fishing gear.

在这个区域捕鱼是禁止的,建议你收回渔具。

31.Martian Princess. This is Nutcracker. Proceed along ice-channel.

沿着有冰的航道继续前进。

32.Light Baby. This is Northerner. I will meet and escort you.

我将过来为你护航。

33.Utopia. This is Otlar Radio. What is your freeboard?

你的干舷多少?

34.ABC Radio. This is Blue Day. What is your latest tropical storm warning information。

你的最新热带风暴警告信息是什么?

35.Gargantua. This is Newharbour. Your message understood.

我已理解你的电文。

36.Red Sea. Anchor position 1 mile upstream from Fishhaven has been allocated to you.

距Fishhaven上游一海里的锚地已经分配给你了。

37.South Point. This is Utopia. I have sighted Iolande.

我已经观测到了Iolande。

38.There is a derelict adrift in position 170 degrees 4.5 miles from Barwater Pier, at 2000 hours

zone time.

区时2000,距Barwater码头4.5海里,170度的位置有一个漂浮物。

39.Utopia will enter waters covered by Avonport Port Control.

Utopia 将进入Avonport 港口控制中心的管制水域。

40.Blighbank. This is Otlar Radio. There is a hampered vessel in position 090 degrees 5 miles

from No.1 Jetty Oilmouth.

距1号栈桥Oilmouth 5英里90度处,有一只障碍船。

41.Avonport. This is Yellow Star. My position has been obtained by Decca.

我船位置已通过台卡获得。

42.Attention all vessels. This is Belin Radio. Navigation warning. Radio beacon service

Whirlpool Rocks has been discontinued.

各船请注意,这里是Belin电台的航行警报。Whirlpool Rocks 无线电信标业务已中断。

43.Utopia is approaching the receiving point for the estuary leading to Sao Pedro.

Utopia 正在驶近通往Sao Pedro 入口处的受理点。

44.Utopia Bridge. I will make tug fast on starboard quarter.

将拖轮在右舿挽牢。

45.Utopia Aft Station. Take tug’s towing line to capstan then make fast on starboard quarter.

把拖轮拖缆带上绞缆机并在右舿挽牢。

46.Utopia Aft Station. Make tug fast on main deck on starboard side.

将拖轮在右侧主甲板上挽牢。

47.Utopia Aft Station. Are you singled up?

你是单绑的吗?

48.Utopia. Let go fore and aft.

前后缆全部解掉。

49.Blue Sea Forward Station. This is Blue Sea Bridge. Send away head lines.

送出首缆。

50.Ruland keeps zone time 10 hours ahead of GMT.

Ruland 为GMT之前的区时不我待10时。

51.Newharbour Pilot Station. This is Utopia. Change to channel six.

请换到6频道。

52.Blue Sea Forward Station. This is Blue Sea Bridge. Heave away head lines.

绞进首缆。

53.Appleport Radio. This is Utopia. My arrival draught, salt water is 2.8 meters forward, 2.6

meters aft.

我船进港海水吃水为:首吃水2.8m ,尾吃水2.6m。

54.Shanghaiport Radio. This is Utopia. My arrival draught, salt water is 2.8 meters forward, 4.6

meters aft.

55.Eagleport Radio. This is Changhe. My departure draught, salt water is 2.8 meters forward,

4.6 meters aft

56.Oredock pilot. This is Huang He. My draught forward 10.2m, aft 11.0m, relative density

1020.

相对密度为本1020。

57.Nanhu. This is Newharbour. You must keep radio silence in this area unless you have the

message about the casualty.

你船必须在这个区域保持无线电静默,除非你有与海难有关的电文。

58.Minghua. This is Newharbour. You must keep radio silence in this area unless you have

message about the casualty.

59.Big Apple. This is Belin Radio. You must get underway.

你船必须起航。

60.Green Land. This is Coastguard Radio. You must get underway.

61.You must alter course to starboard to avoid fishing vessels.

你船必须向右舷改向以避开渔船。

62.Advise you wait for lock clearance at South Point.

请在South Point 等待船闸清爽。

63.You must alter course to starboard to avoid fishing vessels.

64.Fantasia. This is Black Tea. Do not, repeat do not dredge anchor.

重复一遍,请不要拖锚。

65.Oilport Pilot. This is Utopia. What is the anchor position for me?

我的锚位在哪里?

66.Mayday. This is Fantasia. I am on fire in the living space.

我船生活区着火了。

67.Utopia. This is helicopter. Please keep the wind on port bow.

请保持左首受风。

68.Euphoria. This is helicopter. Indicate contact point.

请指示降落点。

69.Helicopter. This is Utopia. I will not make fast hoist. Landing party is ready.

我不固定升降梯,登陆队已准备。

70.Utopia.This is St. Nicholas Strait Information Service. It is clear for you to enter traffic

route.

我要进入的通航分道是否清爽。

71.Flying Fish. This is USCG. You are not complying with traffic regulations.

你没有遵守通航规则。

72.Martian Princess. This is Southpoint Coastguard. You are not keeping to your correct traffic

lane.

你没有保持在正确的通航分道内。

73.Nordhavn, This is Gargantua, What is the weather forecast for area Westercap?

在Westercap处的气象预报是什么?

74.Gargantua. This is Nordhavn. Wind force at Westerccap is force 8.

在Westercap 处的风力为8级。

75.Bigsea This is Flyingfish. Dangerous wreck reported at North Buoy. Advise you stop engine

在North Buoy处报告有危险沉船,请停机。

76.Utopia. This is Banks Radio. Floating ice in poison 47°00ˊNorth, 50°00ˊWest.

Dangerous to navigation. Keep clear.

在北纬47度00分,西经50度00分处有浮冰。航行危险,请避让。

77.Euphoria. This is Navyport. Navigation is closed in area Zebra. Naval exercises. Keep clear.

Zebra 区域禁航,有海军演习,请避让。

78.Utopia. This is Easter Coastguard. There has been a collision in position 52°30ˊNorth.

2°10ˊEast. Stand by to give assistance.

在北纬52度30分,东经2度10分处有碰撞,请待命救援。

79.Euphoria. This is Utopia. You are running into danger. Fog bank ahead of you. Is your radar

working?

80.Arctic Thunder. This is Utopia. I can not see your navigation light.

我看不见你的航行灯。

81.Red Star. This is Blue Sea. Keep clear. You are jettisoning poisonous cargo.

你在抛弃有毒货物。

82.Orehaven Pilot. This is Yokohama. Is the pilot boat on station?

引航员是否在引航站里。

83.Yokohama. This is Orehaven Pilot. You can take pilot at Fairway buoy at 1800 hours local

time.

当地时间1800时你可以在航道浮标接引航员。

84.Utopia. This is Euphoria. Where must I rig pilot ladder?

我要将引航员用梯挂在何处?

85.Valhalla. This is Blue Sea. There is a vessel entering at No.10 buoy.

有一艘船在10号浮标进入。

86.Valhalla. This is Blue Sea. Please proceed to Coco Fairway.

请驶入Coco航道。

87.Utopia. This is Avonport Pilot. Turn to port before anchoring in Outer roads.

在外道抛锚前请向左转。

88.I am crossing the fairway from No. 12 to No. 13 buoy at 12 knots.

我从12号和13号浮标之间穿越航道,航速12节。

89.Fine Apple. This is Yellow Sea. Is there any other traffic?

有其他的来往船只吗?

90.Utopia. This is Valhalla. Must I keep to the leading line?

我必须在导航线内吗?

91.Valhalla. You must keep to the starboard side of the fairway for 4 cables.

你必须保持在航道右侧4链的距离。

92.Avonport Port Control. This is Utopia. My vessel is healthy and I require free pratique.

我船舶上的船员身体健康,我要求无疫通行证。

93.ABC Port Control. This is Blue Boy pilot. I am underway in inner dock.

我在内港池航行。

94.Newharbour Port Control. This is blue Sea. What are my docking instructions?

我的进坞指示是什么?

95.Martin Princess. This is ABC Port Control. Euphoria has left container terminal.

Euphoria已离开集装箱码头。

96.Utopia, This is Avonport Port Control. Vessel Androcles has entered fairway at harbour

buoy.

Androcles 已在港口浮筒处进入航道。

97.Red Sea. This is Belin Radio. Change to No.2 berth.

Red Sea. 请移到二号泊位.

98.St. Nicholas Strait Information Service. This is Utopia. Are there any navigational warnings?

有航行警告吗?

99.Utopia. This is St. Nicholas Strait Information Service. There is a drifting mine reported in

position 54°15ˊNorth, 11°20ˊEast

据报在东经11度20分北纬54度15分有一漂浮水雷.

100.There is a dangerous rock in position 2 miles 180°from South Point marked by isolation dangerous buoy showing white flashing light.

距南罗经点180度2海里处有危险礁石, 标识为闪白光灯的孤立危险浮筒.

101.East bound traffic lane has been discontinued. Please use inshore route.

东向航道分道已被封闭.请使用沿岸通航带.

102.There is a gas leakage from a fractured pipeline in position 170°3 miles from East Tower of South Point Gas Works.

离East Tower south Point Gas Works 3英里方位170度, 管道破裂有气体泄露.

103.Utopia. This is St. Nicholas Strait Information Service. Traffic lane Bravo is blocked.

Traffic has been fractured pipeline traffic lane Charlie.

Utopia Bravo航道被封锁Charlie航道管道破裂.

104.There is A gas leakage from a diverted to in position 170°3 miles from East Tower of South Point Gas Works.

105.Androcles. This is Utopia. Is there fishing gear ahead of me?

你的前方有渔具吗?

106.Utopia. This is World Fisher. You are heading towards fishing gear. There are nets with buoys in this area.

你正驶向渔具,在你正前方区域有带浮标的渔网.

107.Euphoria. This is Utopia. My position is 49°40ˊNorth, 35°23ˊWest. My position has been obtained by astronomical observations

我的天文观测位置是北纬49度40分西经35度23分.

108.Nutcracker. This is Androcles. What is your course to the pilot station?

你去引航站的航向是什么?

109.Red Star. This is Newharbour Radar. Please give me your position again to assist identification.

请再次给出你的位置以便识别.

110.Utopia. This is Nutcracker. Icebreaker assistance is now commencing, keep a continuous radio telephone listening watch.

破冰工作正在进行,请保持无线电话守听.

111.Utopia. This is Nutcracker. Icebreaker assistance is now commencing, keeping a continuous radio telephone listening watch.

破冰工作正在进行,我正保持无线电守听.

112.Shicki Maru. This is Nutcracker. Do not follow me. Thick ice ahead.

不要跟随我,我前面有厚冰.

113.Black Tea. This is Nutcracker. Your place in convoy is No. 1. You will be followed by vessel Martian Princess.

你在护航编队里是1号位,Martian Princess跟在你后面。

114.Martian Princess. This is Nutcracker. Proceeding along ice-channel.

115.Utopia. This is Nutcracker. Icebreaker assistance is now commencing, keeping a continuous radio telephone listening watch.

116.Utopia. This is Nutcracker. Increase your engine speed. Keep correct distance from me.

主机加速,并与我保持适当距离。

117.Utopia. This is Nutcracker. Increase your engine speed. Keep correct distance from me. 118.Shicki Maru. This is Nutcracker. Keep a distance of three zero zero meters between vessels.

船队间距请保持为300米。

119.Big Apple. This is icebreaker. Prepare to receive towline.

我是破冰船,请接拖缆。

120.Utopia. This is Nutcracker. Be ready to cast off towline.

Utopia准备解缆

121.Utopia. This is Nutcracker. Icebreaker’s assistance is suspended due to poor visibility.

能见度不良破冰工作被迫终止。

122.Utopia. This is Nutcracker. Switch on bow search light.

请打开船首探照灯。

123.Martian Princess. This is Nutcracker. Ice-breaker assistance is finished. There is open water ahead.

破冰工作已经结束,前方为可通行水域。

124.Utopia. This is Nutcracker. Ice-breaker assistance is finished. Ice-breaker Northerner will assist you in further navigation.

破冰工作结束,我将进一步为你提供服务。

125.Euphoria. This is Androcles. I am going astern.

我正在倒车。

126.Utopi This is Blibaby. I am not making way through the water.

我没有对水移动。

127.Otlar Radio. This is Blue Eagle. Request details of commencement of transit.

我请求穿越开始时的详细信息。

128.Utopia. This is Newharbour Radio. Transit speed is 6 knots.

穿越速度为6节。

129.Cocoport Radio. This is Utopia. What is your latest tropical storm warning information?

最新的热带风暴警告是什么?

130.Newharbour. This is Gargantua. Assistance is no longer required.

我不再需要援助。

131.Utopia. This is Cocoport Radio. What is the atmospheric pressure and its change at your position?

你处气压是多少?有改变吗?

132.There are salvage operations in position, south side of fairway at Fishhaven.

在Fishhaven航道的南侧正在进行打捞作业。

133.Utopia. This is Newharbour. Vessel Gargantua will turn at the refinery quay, ahead of you.

Gargantua将在你前方的炼油码头改向。

134.Otlar Radio. This is Red Star. What is your latest tropical storm warning information? 135.Is there sufficient depth of water for me to proceed to berth now?

水深是否够我进入迫位。

136.This is Utopia. What’s the position of vessel in distress?

遇险船的位置是什么?

137.Iolande. I expect to reach you at 19:00 hours zone time.

我预计抵达时间为区时1900。

138.This is Oilport. You will meet crossing traffic at position off Gannet Head.

你将在Gannet Head遇到穿越船。

139.Vessel Gargantua is not complying with the traffic regulations.

你没有遵守通航规则。

140.You are running into danger. Advise you alter course to starboard.

你正面临危险,建议你向右改向。

141.All vessels. This is SNSIS. Situation report. The visibility at Dolphin Bank Light Vessel is 2 miles.

各船请注意,这里是情况报告,在Dolphin Bank灯船附近的能见度是2海里。

142.There is a vessel with a difficult tow on passage to Eckhaven now approaching Pelican

Bank Buoy.

开往Eckhaven的一艘操纵困难的拖带船正向Pelican Bank浮筒靠近。

143.SAR Unit. This is Valhalla. Fire is under control. Lifeboat is no longer required 火势已被控制,救生艇不再需要。

144.SAR Unit. This is Valhalla. Yes, I require tugs. My steering gear is damaged.

我需要拖轮,我的舵机受损。

145.Avonport Port Control. This is Red Sea. My radar is not working.

我船雷达故障。

146.I require a pilot. Where can I take a pilot? What are my berthing instructions? Over.

我请求引航,我能在哪里接受引航?我的靠泊指示是什么?

147.Flying Fish. This is Oilport Port Control. Vessel on opposite course 1.5 miles distance will pass on your port side.

有一艘反向船距你1.5海里,将从你船左侧驶过。

148.Avonport Port Control. This is Utopia. I will alter course to 320 degrees at 0315 hours local time.

在当地时间0315我将改驶航向320度

149.Utopia proceeds as instructed to her temporary anchorage.

Utopia根据指示移泊到它的临时锚地。

150.Red Flag. Deep vessel has entered fairway inwards.

有深吃水船驶入进港航道。

151.All vessels. This is Avonport. Navigational warnings. There are pipelaying operations near gas leakage.

各船请注意,航行警告,在气体泄露处附近有管道敷设作业。

152.There is a vessel carrying out hydrographic survey in area off Oilmouth No. 1 quay.

有船只在1号码头区域进行水道测量。

153.All vessels. This is Avonport. Charted depths are decreased by 0.5 meters.

图注水深已减少了0.5米。

154.Utopia. This is Androcles. Buoys are only showing on six miles range scale on my radar.

我的雷达标尺上浮筒显示在6海里处。

155.Androcles. This is Utopia. I will change range scale on approaching. Over.

我接近时将改变雷达标尺。

156.South-westerly gales imminent in sea areas Portcastle and Gull, backing southerly and increasing to force 9.

在Portcastle和Gull附近水域有偏西南大风,转偏南风,风力增加到9级。

157.Broken ice is expected in sea areas Bear and Skua.

预计在Bear 和Skua水域有碎冰。

158.Icebreaker Nutcracker now has to break a channel for the convoy of ships to get through the thicker ice.

破冰船必须为船舶编队开好航道,以通过坚冰区。

会计专业英语期末试题 )

期期末测试题 Ⅰ、Translate The Following Terms Into Chinese 、 1、entity concept 主题概念 2、depreciation折旧 3、double entry system 4、inventories 5、stable monetary unit 6、opening balance 7、current asset 8、financial report 9、prepaid expense 10、internal control 11、cash flow statement 12、cash basis 13、tangible fixed asset 14、managerial accounting 15、current liability 16、internal control 17、sales return and allowance 18、financial position 19、balance sheet 20、direct write-off method Ⅱ、Translate The Following Sentences Into Chinese 、 1、Accounting is often described as an information system、It is the system that measures business activities, processes into reports and communicates these findings to decision makers、 2、The primary users of financial information are investors and creditors、Secondary users include the public, government regulatory agencies, employees, customers, suppliers, industry groups, labor unions, other companies, and academic researchers、 3、There are two sources of assets、One is liabilities and the other is owner’s equity、Liabilities are obligations of an entity arising from past transactions or events, the settlement of which may result in the transfer or use of assets or services in the future、 资产有两个来源,一个就是负债,另一个就是所有者权益。负债就是由过去得交易或事件产生得实体得义务,其结算可能导致未来资产或服务得转让或使用。 4、Accounting elements are basic classification of accounting practices、They are essential units to present the financial position and operating result of an entity、In China, we have six groups of accounting elements、They are assets, liabilities, owner’s equity, revenue, expense and profit (income)、会计要素就是会计实践得基础分类。它们就是保护财务状况与实体经营

光纤通信期末考试题

一、填空题(每空1分,共30分) (1)写出光在真空的速度c、在介质中的速度v、和折射率n之间的关系:。 (2)光由折射率为n1的光密媒质向折射率为n2的光疏媒质传播时(n1> n2),全反射临界角的正弦为sinθIC= 。 (3)光纤通信三个实用的低损耗工作窗口是0.85μm、和。(4)光纤的色散分为色散、色散和色散。 (5)光纤的主要材料是,光纤的结构从里到外依次是____ 和_ __(6)光纤中的传输信号由于受到光纤的和_______影响,使得信号的幅度受到衰减,波形出现失真。 (7)半导体激光器工作时温度会升高,这时会导致阈值电流,输出光功率会。 (8)光衰减器按其衰减量的变化方式不同分________ 衰减器和______ _衰减器两种。 (9)光纤通信的光中继器主要是补偿衰减的光信号和对畸变失真信号进行整形等,它的类型主要有和。 (10)光纤通信是利用________波,在光导纤维中传播,实现信息传输的,它具有传输信息量大、不受外界电磁场干扰和____________等优点。 (11)光与物质作用时有受激吸收、和__________ 三个物理过程,产生激光的主要过程是__________。 (12)光纤的数值孔径NA=__________,其表征了光纤的_________能力,当相对折射率和色散值越大时,NA__________。 (13)光源的作用是将转换成;光检测器的作用是将转换成。 第 1 页共5 页

二、选择题(每小题2分,共20分) 1、光纤包层需要满足的基本要求是() A.为了产生全反射,包层折射率必须比纤芯低 B.包层不能透光,防止光的泄漏 C.必须是塑料,使得光纤柔软 D.包层折射率必须比空气低 2、在激光器中,光的放大是通过() A.粒子数反转分布的激活物质来实现的B.光学谐振腔来实现的 C.泵浦光源来实现的D.外加直流来实现的 3、为了使雪崩光电二极管能正常工作,需在其两端加上( ) A.高正向电压 B.高反向电压 C.低反向电压 D.低正向电压 4、光纤的数值孔径与( )有关。 A. 纤芯的直径 B. 包层的直径 C. 相对折射指数差 D. 光的工作波长 5、PIN光电二极管,因无雪崩倍增作用,因此其雪崩倍增因子为( )。 A. G>1 B. G<1 C. G=1 D. G=0 6、光接收机中将升余弦频谱脉冲信号恢复为“0”和“1”码信号的模块为( )。 A. 均衡器 B. 判决器和时钟恢复电路 C. 放大器 D. 光电检测器 7、EDFA中将光信号和泵浦光混合起来送入掺铒光纤中的器件是( ) A.光滤波器 B.光耦合器 C.光环形器 D.光隔离器 8、光时域反射仪(OTDR)是利用光在光纤中传输时的瑞利散射所产生的背向散射而制成 的精密仪表,它不可以用作()的测量。 A.光纤的长度 B.光纤的传输衰减 C.故障定位 D.光纤的色散系数 9、光隔离器的作用是( ) A.调节光信号的功率大小 B.保证光信号只能正向传输 C.分离同向传输的各路光信号 D.将光纤中传输的监控信号隔离开 10、光纤数字通信系统中不能传输HDB3码的原因是( ) A.光源不能产生负信号光 B.将出现长连“1”或长连“0” C.编码器太复杂 D.码率冗余度太大 第 2 页共5 页

通信工程《光纤通信》考试题(含答案)

1、1966年7月,英籍华人(高锟)博士从理论上分析证明了用光纤作 为传输介质以实现光通信的可能性。 2、光在光纤中传输是利用光的(折射)原理。 3、数值孔径越大,光纤接收光线的能力就越( 强),光纤与光源之间的耦 合效率就越( 高)。 4、目前光纤通信所用光波的波长有三个,它们是:(0.85μm、1.31μm、 1.55μm)。 5、光纤通信系统中最常用的光检测器有:(PIN光电二极管;雪崩光电二极 管)。 6、要使物质能对光进行放大,必须使物质中的( 受激辐射)强于( 受激吸 收),即高能级上的粒子数多于低能级上的粒子数。物质的这一种反常态 的粒子数分布,称为粒子数的反转分布。 7、在多模光纤中,纤芯的半径越( 大),可传输的导波模数量就越多。 8、光缆由缆芯、( 加强元件(或加强芯) )和外护层组成。 9、(波导色散)是指由光纤的光谱宽度和光纤的几何结构所引起的色散。 10、按光纤传导模数量光纤可分为多模光纤和( 单模光纤)。 11、PDH的缺陷之一:在复用信号的帧结构中,由于( 开销比特 )的数量很少,不能提供足够的运行、管理和维护功能,因而不能满足现代通信网对监控和网管的要求。 12、光接收机的主要指标有光接收机的动态范围和(灵敏度)。 13、激光器能产生激光振荡的最低限度称为激光器的(阈值条件)。 14、光纤的(色散)是引起光纤带宽变窄的主要原因,而光纤带宽变窄则会限制光纤的传输容量。 15、误码性能是光纤数字通信系统质量的重要指标之一,产生误码的主要 原因是传输系统的脉冲抖动和(噪声)。

二、选择题:(每小题2分,共20分。1-7:单选题,8-10:多选题) 1、光纤通信是以(A )为载体,光纤为传输媒体的通信方式。 A、光波 B、电信号 C、微波 D、卫星 2、要使光纤导光必须使( B ) A、纤芯折射率小于包层折射率 B、纤芯折射率大于包层折射率 C、纤芯折射率是渐变的 D、纤芯折射率是均匀的 3、(D )是把光信号变为电信号的器件 A、激光器 B、发光二极管 C、光源 D、光检测器 4、CCITT于(C)年接受了SONET概念,并重新命名为SDH。 A、1985 B、1970 C、1988 D、1990 5、SDH传输网最基本的同步传送模块是STM-1,其信号速率为( A )kbit/s。 A、155520 B、622080 C、2488320 D、9953280 6、掺铒光纤放大器(EDFA)的工作波长为(B)nm波段。 A、1310 B、1550 C、1510 D、850 7、发光二极管发出的光是非相干光,它的基本原理是(B)。 A、受激吸收 B、自发辐射 C、受激辐射 D、自发吸收 8、光纤通信系统的是由(ABCD )组成的。 A、电端机 B、光端机 C、中继器 D、光纤光缆线路 9、要精确控制激光器的输出功率,应从两方面着手:一是控制(B);二是控制(D)。 A、微型半导体制冷器 B、调制脉冲电流的幅度 C、热敏电阻 D、激光器的偏置电流 10、光纤传输特性主要有(AB ) A、色散 B、损耗 C、模场直径 D 、截止波长

光纤通信 期末考试试卷(含答案)

2、光在光纤中传输是利用光的(折射)原理。 5、光纤通信系统中最常用的光检测器有:( PIN光电二极管)、(雪崩光电二极管)。 6、要使物质能对光进行放大,必须使物质中的( 受激辐射 )强于( 受激吸收 ),即高能级上的粒子数多于低能级上的粒子数。物质的这一种反常态的粒子数分布,称为粒子数的反转分布。 7、在多模光纤中,纤芯的半径越( 大 ),可传输的导波模数量就越多。 9、(波导色散)是指由光纤的光谱宽度和光纤的几何结构所引起的色散。 11、PDH的缺陷之一:在复用信号的帧结构中,由于( 开销比特 )的数量很少,不能提供足够的运行、管理和维护功能,因而不能满足现代通信网对监控和网管的要求。 12、光接收机的主要指标有光接收机的动态范围和(灵敏度)。 13、激光器能产生激光振荡的最低限度称为激光器的(阈值条件)。 14、光纤的(色散)是引起光纤带宽变窄的主要原因,而光纤带宽变窄则会限制光纤的传输容量。 15、误码性能是光纤数字通信系统质量的重要指标之一,产生误码的主要原因是传输系统的脉冲抖动和(噪声)。 二、选择题:(每小题2分,共20分。1-7:单选题,8-10:多选题) 4、CCITT于()年接受了SONET概念,并重新命名为SDH。 A、1985 B、1970 C、1988 D、1990 6、掺铒光纤放大器(EDFA)的工作波长为()nm波段。 A、1310 B、1550 C、1510 D、850 7、发光二极管发出的光是非相干光,它的基本原理是()。 A、受激吸收 B、自发辐射 C、受激辐射 D、自发吸收 9、要精确控制激光器的输出功率,应从两方面着手:一是控制( B );

专业英语期末试卷

ACCOUNTING ENGLISH Middle-of-term Test Papers PartⅠ.Translating the following terms 1、Notes to financial statements 2、Accounting elements 3、Variable costs 4、Economic entity 5、Depreciation expense 6、Deferred income taxes 7、Nominal accounts 8、ROA 9、LIFO 10、Work in process 11、现金收支 12、原材料 13、制造费用 14、相关性 15、持续经营 16、复式记账 17、优先股 18、预付费用 19、购货退回与折让 20、永续盘存制

PartⅡ.True or False 1、 The accounting process generates financial reports for both “internal ”and “external”users. 2、The balance sheet reflects the basic accounting equation and the means of financing the organization's assets. 3、The existence of Accounts Receivable on the Balance Sheet indicates that the company has one or more creditors. 4、Liabilities are classified and presented in increasing order of liquidity. 5、Working capital equals current assets less current liabilities. 6、Declaration of dividends reduces the retained earnings portion of the owners' equity of the corporation and creates a liabilities called Dividends Payable. 7、A chart of accounts is a listing of the titles of all accounts. 8、The cash basis of accounting often violates the matching rule. 9、Closing entries convert real and nominal accounts to zero balance. 10、The work sheet is published with the balance sheet and income statement, as a supplementary statement. 11、A company's sustainable growth rate is the highest growth rate in sales it can attain without issuing new stock. 12、Only rapidly growing firms have growth management problems.

光纤通信期末考试题

一、填空题(每空1分,共30分) (1)在光纤通信中,中继距离受光纤损耗与色散的制约。 (2)色散的常用单位就是 ps/(nm、km) , G、652光纤的中文名称就是标准单模 ,它的0色散点在1、31微米附近。 (3)光子的能量与其频率的关系为 :E P = hf 。原子中电子因受激辐射发生光跃迁时,这时感应光子与发射光子就是一模一样的,就是指发射光子与感应光子不仅___频率_____ _相同、相位相同,而且偏振与传输方向都相同。 (4)光衰减器按其衰减量的变化方式不同分____固定__衰减器与__可变__衰减器两种。 (5)光纤通信的光中继器主要就是补偿衰减的光信号与对畸变失真信号进行整形等,它的类型主要有光电型光中继器与全光型光中继器。 (6)光电检测器的噪声主要包括暗电流噪声、量子噪声、热噪声与放大器噪声等。受激辐射自发辐射(12) (13) (7)WDM中通常在业务信息传输带外选用一特定波长作为监控波长,优先选用的波长为1、51μm。 (8)SDH中,当具有一定频差的输入信息装入C-4时要经过码速调整,利用其中的调整控制比特来控制相应的调整机会比特比特就是作为信息比特,还就是填充比特。 (9)半导体激光器工作时温度会升高,这时会导致阈值电流升高 ,输出光功率会降低。 (10)WDM系统可以分为集成式系统与开放式系统两大类,其中开放式系统要求终端具有标准的光波长与满足长距离传输的光源。 (11)对于SDH的复用映射单元中的容器,我国采用了三种分别就是:C-12、C3与C-4。 (12)数字光纤传输系统的两种传输体制为PDH 与SDH 。 二、选择题 2、在激光器中,光的放大就是通过( A ) A.粒子数反转分布的激活物质来实现的B.光学谐振腔来实现的 C.泵浦光源来实现的D.外加直流来实现的 3、STM-64信号的码速率为( D ) A.155、520 Mb/s B.622、080 Mb/s C.2 488、320 Mb/s D.9 953、280 Mb/s 4、以下哪个就是掺铒光纤放大器的功率源( C )

汽车工程专业英语》期末试卷

一、选择题 1、The four-stroke cycle operates in which order __C__. A. intake, exhaust, power, compression B. intake, power, compression, exhaust C. intake, compression, power, exhaust 2、With the piston at the bottom of the cylinder, the ___C____ valve ___________ to allow the burned exhaust gas to be expelled to the exhaust system. A.intake, closes B. exhaust, closes C. exhaust, opens 3、A car engine's job is to ___B__ A. Convert fuel into heat B. Convert fuel into motion C. Convert fuel into exhaust 4、When the crankshaft completes four revolutions for a four-cycle engine, each cylinder will have gone through ____B____intake stroke(s). A.one B. two C. Three 5、___C___ is the life-blood of the engine. A. gas B. water C. Oil 6、What is the core of a car's engine___C___ A.The spark plug B. exhaust C. The cylinder 7、What determines the size and the placement of the engine block____C____ A. The number of spark plugs B. The number of pistons C. The number of cylinders 8、In the standard engine, each cylinder has ___A___. A.four valves B. two valves C. one valve 9、A crankshaft's job in an engine is to ___C___ A. Deliver fuel to the cylinders B. Keep cylinder heads in place C. Change linear motion into rotational motion 10、The _____C___ system on an internal combustion engine provides the spark that ignites the combustible air/fuel mixture in the combustion chamber. A.starting B. fuel C. igniting 二、填空题 1.Today’s average car contains more than 15000 separate, individual parts that must work together. These parts can be grouped into four major categories: body,engine,chassis and electrical system . 2.The direction motion of vehicle is controlled by a steering system. A basic steering system has 3 main parts: steering control mechanism ,steering gear and steering linkage mechanism which connecting wheels and steering gear . 3.The location of the driving axle determines whether the vehicle is classified as rear-wheel?drive ,front-wheel?drive ,four-wheel?drive and all-wheel drive. 4.The modern clutch9 is a single plate, dry disc . It consists of five major parts: flywheel, clutch disc , pressure plate assembly, throw-out bearing , and clutch linkage.

光纤通信期末考试试卷参考答案

潍坊学院2009-2010学年第2学期期末考试 《光纤通信基础》试卷(A卷)参考答案及评分标准 一、单项选择题(每小题2分,共30分) 1C、2B、3B、4D、5C、6A、7D、8C、9C、10D、11C、12D、13B、14C、15A 二、填空题(每空1分,共20分) 1、光作为载波 2、um um 3、大 4、自聚焦 5、谐振腔 6、受激辐射 7、暗电流噪声8、隔离度9、动态范围10、10-270 11、光纤放大器12、量子效率 13、不能14、分插复用器交叉连接设备15、下降16、17、空分交换波分交换 三、简答题(本大题共6小题,每小题5分,共30分) 1、答:光纤通信系统主要由发射机、接收机和光纤线路三个部分组成。(2分) 发射机的主要作用:是把输入电信号转换为光信号,并用耦合技术把光信号最大 限度地注入光纤线路。光纤线路把来自于光发射机的光信号,以尽可能小的崎变 和衰减传输至接收机。光接收机把从光纤线路输出的光信号还原为电信号。(3分) 2、答:光纤损耗包括吸收损耗和散射损耗:(2分) 吸收损耗是由SiO2材料引起的固有吸收和由杂质引起的吸收产生的(1分) 散射损耗主要由材料微观密度不均匀引起的瑞利散射和光纤结构缺陷引起的散射产生的(1分) 光纤损耗使系统的传输距离受到限制,不利于长距离光纤通信。(1分) 3、答:在PN结界面上,由于电子和空穴的扩散运动,形成内部电场;内部电场使电子和空穴产生与扩散运动方向相反的漂移运动,最终使能带产生倾斜,在PN线路附近形成耗尽层。(1分) 当入射光照射PN结时,若光子能量大于带隙,便发生受激吸收,而形成光生电子—空穴对。(1分) 在耗尽层,由于内部电场的作用,电子向N区运动,空穴向P区运动,形成光生漂移电流。在耗尽层两侧中性电场区,由热运动,部分光行电子和空穴通过扩散运动进入耗尽层,在电场的作用下,形成和漂移运动相同方向的光生扩散电流。(2分) 光生漂移电流分量和光生扩散电流分量的总和即为光生电流,当P层和N层连接的电路开路时,便在两端产生光生电动势,这种效应称为光电效应。(1分) 4、答:在LD的驱动电路里,设置自动功率控制电路(APC)是为了调节LD的偏流, 使输出光功率稳定。(2分)在LD的驱动电路里,设置自动温度控制电路是因为半导体光源的输出特性受温度影 响较大,特别是长波长半导体激光器对温度更加敏感,为保证输出特性稳定,对激 光器进行温度控制是十分必要的。(3分)

最新光纤通信期末考试试题(简答)

光纤通信期末考试试题(简答) (开卷90分钟内完成,1~5题每题6分,6~15题每题7分,共100分) 1、光纤的结构分别由哪三部分构成,各部分作用是什么? 光纤由纤芯、包层和涂覆层3部分组成。 其中纤芯:纤芯位于光纤的中心部位。直径d 1=4μm ~50μm ,单模光纤的纤芯为4μm ~10μm ,多模光纤的纤芯为50μm 。纤芯的成分是高纯度SiO2,作用是提高纤芯对光的折射率(n 1),以传输光信号。包层:包层位于纤芯的周围。 直径d 2=125μm ,其成分也是含有极少量掺杂剂的高纯度SiO 2。略低于纤芯的折射率,即n 1>n 2,它使得光信号封闭在纤芯中传输。涂覆层:光纤的最外层为涂覆层,包括一次涂覆层,缓冲层和二次涂覆层。 涂覆的作用是保护光纤不受水汽侵蚀和机械擦伤,同时又增加了光纤的机械强度与可弯曲性,起着延长光纤寿命的作用。涂覆后的光纤其外径约1.5mm 。 2、光缆的结构分别由哪三部分构成,各部分作用是什么? 光缆由缆芯、护层和加强芯组成。 其中缆芯就是套塑光纤,护层对已成缆的光纤芯线起保护作用,避免受外界机械力和环境损坏。护层可分为内护层和外护层。内护层用来防潮。外护层起抗侧压、耐磨、抗紫外线、防湿作用,隔离外界的不良影响。加强芯主要承受敷设安装时所加的外力。 3、光纤的三个传输窗口是什么?光纤中的导波属于TM/TE/TEM/近似TEM 波? 0.85μm 、1.31μm 、1.55μm 。 光纤中得电磁场近似为横电磁波(TEM 波) 4、什么是归一化频率V ,V 取值多少时光纤单模传输?什么叫光纤的截止波长? 光纤的归一化频率V 012/1/)2(2λαπn ?=是一个综合性参数,与光纤的结构参数(纤芯的折射率n1、半径a 、折射率相对差△)和工作波长λ0有关。其数值大小决定了弱波导光纤中电磁场的分布和传输情况。 光纤单模传输的条件是0

专业英语试题

专业英语 一、Write the Chinese name for each of the following (每小题1分,共10分) 1. methane: 2. hexene: 3. hydroxyl group : 4. butylaldehyde: 5. quantitative analysis: 6. sodium hydroxide: 7. organic chemistry : 8. primary alcohol : 9. p -hydroxybenzoic acid: 10. oxyacid: 二、Write the English name for each of the following (每小题2分,共20分) 1. 不饱和烃: 2. 官能团: 3. 氮元素: 4. 化学动力学: 6. 7. CH 3CH 2CHCOOH CH 3 CH 3CHCH CH 2 CH 3 8. 134烷: 9. (CH 3CH 2)2Hg 10. 三、Translate the following sentences into Chinese (每题3分,共30分) 1.According to these new definitions and acid is any hydrogen containing species in which the bond holding the hydrogen can be broken so that the hydrogen ion can be lost. 2.Mineral-bearing water is often evaporated to give a solid free product for boiler feed or for human consumption. 3.If the unsatuaration is due to the presence of a triple bond the compounds are called alkynes. 4. An acid was once defined as a substance that would form hydrogen ions in water solution and a base as one that would form hydroxide ions in the same. 5.The methyl group on the benzene ring greatly facilitates the nitration of toluene.

光纤通信期末考试题及答案分析

光纤通信期末考试题及答案分析 一、填空: 1、1966年,在英国标准电信实验室工作的华裔科学家首先提出用石英玻璃纤维作为光纤通信的媒质,为现代光纤通信奠定了理论基础。 2、光纤传输是以作为信号载体,以作为传输媒质的传输方式。 3、光纤通常由、和三部分组成的。 4、据光纤横截面上折射率分布的不同将光纤分类为和。 5、光纤色散主要包括材料色散、、和偏振模色散。 6、光纤通信的最低损耗波长是,零色散波长是。 7、数值孔径表示光纤的集光能力,其公式为。 8、阶跃光纤的相对折射率差公式为 9、光纤通信中常用的低损耗窗口为、1310nm、。 10、V是光纤中的重要结构参量,称为归一化频率,其定义式为。 11、模式是任何光纤中都能存在、永不截止的模式,称为基模或主模。 12、阶跃折射率光纤单模传输条件为:。 13、电子在两能级之间跃迁主要有3个过程,分别为、和受激吸收。 14、光纤通信中最常用的光源为和。 15、光调制可分为和两大类。 16、光纤通信中最常用的光电检测器是和。

17、掺铒光纤放大器EDFA采用的泵浦源工作波长为1480nm和。 18、STM-1是SDH中的基本同步传输模块,其标准速率为:。 19、单信道光纤通信系统功率预算和色散预算的设计方法有两种:统计设计法 和。 20、光纤通信是以为载频,以为传输介质的通信方式。 21、光纤单模传输时,其归一化频率应小于等于。 22.数值孔径表示光纤的集光能力,其公式为:。 23、所谓模式是指能在光纤中独立存在的一种分布形式。 24、传统的O/E/O式再生器具有3R功能,即在、和再生功能。 25、按射线理论,阶跃型光纤中光射线主要有子午光线和两类。 26、光纤中的传输信号由于受到光纤的损耗和的影响,使得信号的幅度受到衰减;波形出现失真。 27、半导体材料的能级结构不是分立的单值能级,而是有一定宽度的带状结构,称为。 28、半导体P-N结上外加负偏压产生的电场方向与方向一致,这有利于耗尽层的加宽。 29、采用渐变型光纤可以减小光纤中的色散。 30、SDH网中,为了便于网络的运行、管理等,在SDH帧结构中设置了。 31、SDH的STM-N是块状帧结构,有9行,列。 32、处于粒子数反转分布状态的工作物质称为。

期末英语专业跨文化交际试题试题及参考答案

中央广播电视大学2003--2004学年度第二学期“开放本科”期末考试 英语专业跨文化交际试题 注意事项 一、将你的学号、姓名及分校(工作站)名称填写在答题纸的规定栏内。考试结束后,把试卷和答题纸放在桌上。试卷和答题纸均不得带出考场。 二、仔细阅读题目的说明,并按题目要求答题。答案一定要写在答题纸指定的位置上,写在试卷上的答案无效。 三、用蓝、黑圆珠笔或钢笔答题,使用铅笔答题无效。 Information for the Examinees: This examination consists of FOUR sections.These are: Section I:Listening(20 points,30 minutes) Section II:Language Appropriacy and Accuracy(30 points,20 minutes) SectionⅢ:Reading Comprehension(20 points,30 minutes) Section lV:Communication Analysis(30 points,40 minutes) The total marks for this examination are 100 points.Time allowed for competing this examination is 2 hours(1 20 minutes)allowed for completing this examination is hours (120 minutes). Section I:Listening [20 points] You are going to listen to an interview.Then choose the best answer from A,B,C and D to answer each question.Write your answers on the Answer Sheet. 1.Concerning the issue of maternity,what ideas prevail among Chinese women? A.The modern concept. B.The traditional concept. C.The responsibility to the society.’ D.The responsibility to the family. 2.According to the passage,raising children——. A.is an unbearable burden to women B.is a significant part of a woman’s life C.is the permanent task of women D is the task 0f both a man and a woman 3.Giving birth . A.brings great pleasure to women B.differs men from women physically and spiritually C.makes the women’s life complete D.all the above 4.Those oppose giving birth think that . A.giving birth is something rather primitive

光纤通信期末考试

光纤通信期末考试

考试格式 一、填空题 二、简答题 三、综合题 四、计算题 第一章概述 1.光纤通信系统主要由光发送机(将电信号转换为光信号,将生成的光信号注入光纤)、光纤光缆(为光信号的传送提供传送媒介即信道,将光信号由一处发送到另一处)、中继器(延长光信号的传输距离)、光接收机组成,;光纤通信系统的优点:光纤的容量大损耗低中继距离长抗电磁干扰能力强保密性能好体积小重量轻节省有色金属和原材料,缺点:抗拉强度低光纤连接困难光纤怕水。 2.1966年由英籍华人高锟和霍克哈姆提出可以使用光学纤维作为传输介质。 3.1970年康宁公司研制第一根损耗为20dB/km的光纤。 4.光纤通信是以光纤为传输媒介,以光波作为载波的通信方式 第二章光纤和光缆 1、光纤由折射率较高的纤芯、折射率较低的包层和外面的涂覆层组成,涂覆层的功能:保护光纤不受水汽的侵蚀和机械擦伤同时增加光纤的柔韧性。

2、光纤的类型 按光纤截面上折射率分布分类:阶跃型光纤渐变性光纤 按传输模式的数量分类:多模光纤单模光纤 按光纤的工作波长分类:短波长光纤长波长光纤超长波长光纤 3、基本概念 单模光纤:只能传输一种模式的光纤。多模光纤:允许多个模式在其中传输的光纤或在多模光纤中允许存在多个分离的传导模;光缆:光纤和其它元件的组合体 4、光纤的导光原理: 5、基本参数的应用 数值孔径NA 归一化频率V(判断一根光纤是否单模传输、光纤传导模的数目) 第三章光纤的传输特性 P59 材料色散中光纤的色散系数:一根光纤的色散系数可能是正数也可能是负数,不论正色散系数还是负色散系数都会让脉冲展宽。而将两根色散系数相反的光纤连接起来,光纤色散将会得到改善。 3、色散与带宽的关系: 为什么单模光纤的带宽比多模光纤的带宽大得多?答:因为单模光纤没有色散,所以单模光纤时延差比多模光纤时延差

2017最新机械专业英语期末考试题及答案

机械专业英语期末考试题及答案一.词汇翻译 画法几何descriptive geometry 机械制图Mechanical drawing 投影projection 视图view 剖视图profile chart 标准件standard component 零件图part drawing 装配图assembly drawing 尺寸标注size marking 技术要求technical requirements 主轴spindle 主轴箱headstock 卡盘chuck 加工中心machining center 车刀lathe tool 车床lathe 钻削镗削bore 车削turning 磨床grinder 基准benchmark 钳工locksmith 机螺纹thread 电一体化mechanotronics mechanical-electrical integration 精加工finish machining 粗加工rough machining 变速箱体gearbox casing 表面粗糙度surface roughness

二.将下列短语译成汉语 1.the fatigue loading(疲劳载荷) 2.the radial loads(径向负荷) 3.the thrust loads逆负荷 4.the ball bearing球轴承 5.the roller bearing滚子轴承 6.the single-row bearings单沟轴承 7.the double-row bearing双沟轴承 8.the needle bearing滚针轴承 9.the bearing life轴承寿命 10.The rating life额定寿命 11.the axis of rotation旋转轴 12.The helix angle螺旋角 13. a right-hand helix 右旋 14. a left-hand helix左旋 15.an involute helicoids螺旋面 16.an involute curve渐开线 17.the shaft centerlines轴中心线 18.worm gear蜗轮 19.the hypoid gear准双曲面齿轮 20.right angle直角 21.worm gearing蜗杆传动 22.the lead angle导角 23.shaft angle轴线角度 24.bending load弯曲载荷 25.tension load张力负荷 https://www.wendangku.net/doc/1a13819965.html,pression load压缩负载 27.torsional load扭转负荷 28.the bending moment弯矩 29.the bending stress弯曲应力 30.30.four-bar linkage(四连杆机构) 三.翻译下列句子 1. The simplest closed-loop linkage is the four-bar linkage, which has three moving links (plus one fixed link) and four pin joints.(最简单的封闭式的连杆机构就是四杆机构,四杆 机构有三个运动构件(加上一个固定构件)并且有四个销轴。) 2. Although the four-bar linkage and slider-crank mechanism are very useful and found in thousands of applications, we can see that these linkages have limited performance level.(虽然四杆机构和曲柄滑块机构是非常有用而且在成千上万的应用中都可找到。但是我们还看到,这些连杆机构其性能水平的发挥已经受到限制。) 3. The process of drawing kinematic diagrams and determining degrees of freedom of mechanisms are the first steps in both the kinematic analysis and synthesis process.(画运动图和确定机构自由度的过程,就是运动分析和综合过程的第一个阶段。) 4. The ability to visualize relative motion, to reason why a mechanism is designed the way it is, and the ability to improve on a particular design are marks of a successful

会计专业英语期末试题期期末测试题

会计专业英语期末试题期期末测试题 Ⅰ、Translate The Following Terms Into Chinese. 1.entity concept主题概念 2.depreciation折旧 3.double entry system 4.inventories 5.stable monetary unit 6.opening balance 7.current asset8.financial report 9.prepaid expense10.internal control 11.cash flow statement12.cash basis 13.tangible fixed asset14.managerial accounting 15.current liability16.internal control 17.sales return and allowance18.financial position 19.balance sheet20.direct write-off method Ⅱ、Translate The Following Sentences Into Chinese. 1.Accounting is often described as an information system. It is the system that measures business activities, processes into reports and communicates these findings to decision makers. 2.The primary users of financial information are investors and creditors.Secondary users include the

相关文档
相关文档 最新文档