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奥特路7A M1---2单项选择

奥特路7A M1---2单项选择
奥特路7A M1---2单项选择

奥特路6C班牛津7A U1---U4复习( )1. We often play ______ football after school.

A.a

B. the

C. our

D. /

( )2. Amy is good at ________.

A.s wim

B. swimming

C. swiming

D. swims ( )3. ---What does your brother do? ---_______.

A.H e’s a policeman

B. He likes playing football

C.He’s 12 years old

D. He has a good friend ( )4. ---______ does he live? --In Shanghai.

A.W hen

B. Where

C. What

D. How ( )5. Joan is Chinese. She _______ Chinese.

A.S peaks

B. tells

C. talks

D. says ( )6. The students in Class two like ______ sports.

A.P laying

B. play

C. plays

D. played ( )7. There ____ a pencil and two rulers in the pencil-box.

A.Are

B. is

C. be

D. have

( )8. Linda wants ______ basketball with us this afternoon.

A.Play

B. to play D. plays D. playing ( )9. Do you know the girl _______ Amy?

A.Call

B. calls

C. called

D. calling ( )10. Where ______ your English teacher come from?

A.Is

B. are

C. do

D. does

( )11. ---______ does Bill go to school? ---On foot.

A.When

B. How

C. Where

D. Why

( )12. ---I saw you come to school by bus this morning.

---Oh, I _______ come to school by bus, but it is raining today.

A.Seldom

B. always

C. sometimes

D. usually

( )13. ---Can your father drive? ---Yes, and he usually _____ to school.

A.drove

B. is driving

C. drives

D. usually

( )14. I go out for a walk _____ my parents every evening.

A.by

B. from

C. with

D. in

( )15. _______ beautiful your school is!

A.How a

B. How

C. What a

D. What

( )16. My father always goes to bed _______ 10 p.m.

A.On

B. in

C. for

D. at

( )17. ---Do they enjoy ______ in Shandong? ---Yes, they do.

A.Work

B. works

C. working

D. to work

( )18. ---________ do you watch TV? ---Every day.

A.How long

B. How often

C. How soon

D. How old ( )19. Tom, please give me _______.

A.A glass of milk

B. a glass of milk

C. two glass of milk

D. two

glasses of milks

( )20. Jenny is friendly, and she always helps me ______ my English.

A.with

B. to

C. of

D. on

( )21. The snow is too heavy. All the roads _______ by it and it’s white everywhere.

A.Cover

B. covered

C. are covered

D. is covered ( )22. ---There goes the bell. ---It’s time for class. Let’s stop _______.

A.talk

B. to talk

C. talking

D. not talk

( )23. It is very important for us _____ English well.

A.learn

B. to learn

C. learning

D. learned ( )24. ---What’s on the desk? ---There ____ a computer and some books on it

A.are

B. is

C. have

D. has

( )25. Mary had ______ e-dictionary. She got it from her uncle.

A.a

B. an

C. the

D. /

( )26. We can’t work out the physics problem. Can you tell us _________?

A. how to do

B. what to do it

C. how to do it

D. what should to do

( )27. The teacher asked Ben _______ a difficult question in class.

A.answer

B. answering

C. to answer

D. answered ( )28. ---I want _____ more coffee. ---I’m sorry there isn’t ____ left now.

A.some; some

B. some; any

C. any; some

D. any; any ( )29. Come on, children. Help yourselves to some _____ if you like.

A. fish and chicken

B. fishes and chicken

C. fish and chickens

D. fishes and chickens

( )30. He’s from ________. He’s an Australian.

A.Australian

B. Australians

C. Australia

D. australia ( )31. I’m watching him _______ a kite.

A.flying

B. to fly

C. flies

D. is flying

( )32. Look! The _____ are falling from the tree.

A.leaf

B. leafs

C. leaves

D. leafes ( )33. It is ______ in Harbin in winter.

A.rainy

B. snowy

C. hot

D. warm ( )34. Everything _______ going well.

A.am

B. is

C. are

D. /

( )35. It is exciting ______ kites in spring.

A.fly

B. flies

C. flying

D. to fly ( )36. I usually spend half an hour ______ my homework every night.

A.at

B. in

C. on

D. to

( )37. I visit my friends _____ the Spring Festival.

A.in

B. at

C. during

D. on

( )38. There are ______ people in the park.

A. a lot

B. lot of

C. a lots of

D. a lot of ( )39. There is _______ snow today.

A.big

B. heavy

C. heavily

D. strongly

初中英语较难单项选择题100例附答案解析

初中英语较难单项选择题100例附答案解析 ( ) 1. ________ it is today! A. What fine weather B. What a fine weather C. How a fine weather D. How fine a weather ( ) 2. Which is the way to the __________? A. shoe factory B. shoes factory C. shoe’s factory D. shoes’ factory ( ) 3. This class ________ now. Miss Gao teaches them. A. are studying B. is studying C. be studying D. studying ( ) 4. We will have a _________ holiday after the exam. A. two month B. two-month C. two month’s D. two-months ( ) 5. There is no enough ________ on the corner to put the table. A. place B. room C. floor D. ground ( ) 6. We can have _____ blue sky if we create _____ less polluted world. A. a; a B. a; the C. the; a D. the; the ( ) 7. — Are you ________ American or English? — English.. We are working in Wuhu. A. a B. \ C. the D. an ( ) 8. You like playing basketball, and he likes running, _______? A. don’t you B. doesn’t he C. do you D. does he ( ) 9. —Why not take ____ umbrella w ith the sign “ Made in China”?It is _____ useful umbrella? —What _______ good advice it is! A. an; an; a B. an; a; \ C. a; an; a D. \; an; a ( ) 10. – When shall we meet again next week? -- _______ day is possible. It’s no problem with me. A. Either B. Neither C. Every D. Any ( ) 11. Robert has gone to _________ city and he’ll be back in a week. A. other B. the other C. another D. any other ( ) 12. – A latest magazine, please. - Only one left. Would you like to have ________? A. it B. one C. this D. that ( ) 13. – Which book would you like to borrow? -- ________ of the two books is OK with me. A. Either B. Both C. Any D. None ( ) 14. Mrs. Lee teaches ________ math. We all like her. A. we B. us C. our D. ours ( ) 15. There are many trees on ________ side of the street. A. either B. any C. all D. both ( ) 16.________ is the population of the city? A. How many B. What C. How many people D. How much ( ) 17. —Why don’t we take a little break? —Didn’t we just have _______ ? A. it B .that C. one D. this ( ) 18. The teacher asked the boy many questions,but he only answered___ of them

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2选1多路选择器 EDA实验报告

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初中英语中考单项选择题专项训练250题(附答案) ( ) is ____used and ______ people are interested in it. A wide, many more B. widely, a lot more C. wide, more D. widely, much more ( )2、---- What would you like to drink ---- It doesn’t matter. ________ will do . A. Nothing B. Everything C. Something D. Anything ( )3、This question is very difficult . _______ people can understand it. A. Little B. A few C. Few D. A little ( )4.、After entering the WTO, _______ foreigners will come to our country for business. A. some B. fewer C. all D. more ( )5、---- The exam was very easy, wasn’t it ---- Yes, but I don’t think _______ could pass it. A. somebody B. any body C. nobody D. everybody ( )6、The population of Shanghai is larger than __________ of Hangzhou. A. one B. it C. what D. that ( )7、There is only _______ walk from my home to school. A. five minutes B. five minutes’ C. five minute D. fifth minute’s ( )8、Wang Qiang is a _________ boy. A. five-year-old B. five year old C. five-years-old D. five years old ( )9、The boy was born______ the night of May 20,1999. A. at B. on C. in D. doing ( )10、I’ve been here ___ 3 o’clock. That means I have stayed here ___ an hour and a half. A. at ;since B. at; for C. since; for D. since; since ( )11、English is as _________ as Chinese. You should learn it well. A. important B. more important C. the most important D. much more important ( )12、We’ve never seen _________ flower before. A. such a beautiful B. such beautiful C. so a beautiful D. so beautiful ( )13、You must wear glasses. They can keep your eyes ________. A. save B. safe C. safely D. to save ( )14、Would you please speak _______ I still can’t follow you. A. slow B. much slow C. much slowly D. more slowly ( )15、---- What was the weather like yesterday ---- It was terrible. It rained _______. People could _______ go out. A. hard; hard B. hardly; hard C. hardly; hardly D. hard; hardly ( )16. There are few _______ in the fridge. Let’s go and buy some peas, carrots and cabbages. A. vegetables B. fruit C. meat D. eggs ( )17. This room is __________. A. B ill and David’s B. Bill’s and David’s C. Bills and David’s D. Bill and David

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八选一数据选择器

《集成电路设计实践》报告 题目:8选1数据选择器 院系:自动化学院电子工程系 专业班级:微电121班 学生学号:3120433003 学生姓名:王瑜 指导教师姓名:王凤娟职称:讲师起止时间:2015-12-21---2016-1-9 成绩:

一、设计任务 1) 依据8选1数据选择器的真值表,给出八选一MUX电路图,完成由电路图到晶体管级的转化(需提出至少2种方案); 2) 绘制原理图(Sedit),完成电路特性模拟(Tspice,瞬态特性),给出电路最大延时时间; 3) 遵循设计规则完成晶体管级电路图的版图,流程如下:版图布局规划-基本单元绘制-功能块的绘制-布线规划-总体版图); 4) 版图检查与验证(DRC检查); 5) 针对自己画的版图,给出实现该电路的工艺流程图。 二、电路设计方案的确定 数据选择器是指经过选择,把多个通道的数据传送到唯一的公共数据通道上去,实现数据选择功能的逻辑电路称为数据选择器。它的作用相当于多个输入的单刀多掷开关,其示意图如下所示 数据选择器除了可以实现一些组合逻辑功能以外,还可以做分时多路传输电路,函数发生器及数码比较器

等,常见的数据比较器有2选1,4选1,8选1,16选1电路。 示意图 在多路数据传送过程中,能够根据需要将其中任意一路选出来的电路,叫做数据选择器。

数据选择器(MUX)的逻辑功能是在地址选择信号的控制下,从多路数据中选择一路数据作为输出信号。 本次设计的是8选1数据选择器。选择控制端(地址端)为K2,K1,K0,按二进制译码,从8个输入数据D0-D7中,选择一个需要的数据送到输出端Y。 根据多路开关的开关状态(地址码)K2,K1,K0的状态选择D0-D7中某一个通道的数据输送到输出端Y。 如:K2K1K0=000,则选择D0数据到输出端,即Y=D0。 如:K2K1K0=001,则选择D1数据到输出端,即Y=D1,其余类推。 8选1 MUX功能表如下: K2 K1 K0 Y 0 0 0 D0 0 0 1 D1 0 1 0 D2 0 1 1 D3 1 0 0 D4 1 0 1 D5 1 1 0 D6 1 1 1 D7

VHDL语言设计4选1多路选择器

4选1多路选择器的VHDL描述 要求:THEN语句和CASE语句实现4选1多路选择器,其中选择控制信号s1和s0的数据类型为STD_LOGIC_VECTOR;当s1=?0?,s0=?0?;s1=?0?,s0=?1?;s1=?1?,s0=?0?和s1=?1?,s0=?1?时,分别执行y<=a、y<=b、y<=c、y<=d。 一、解法1:用IF_THEN语句实现4选1多路选择器 (1)程序: LIBRARY IEEE; USE IEEE.STD_LOGIC_1164.ALL; ENTITY mux41 IS PORT (a,b,c,d: IN STD_LOGIC; s0: IN STD_LOGIC; s1: IN STD_LOGIC; y: OUT STD_LOGIC); END ENTITY mux41; ARCHITECTURE if_mux41 OF mux41 IS SIGNAL s0s1 : STD_LOGIC_VECTOR(1 DOWNTO 0);--定义标准逻辑位矢量数据BEGIN s0s1<=s1&s0; --s1相并s0,即s1与s0并置操作 PROCESS(s0s1,a,b,c,d) BEGIN IF s0s1 = "00" THEN y <= a; ELSIF s0s1 = "01" THEN y <= b; ELSIF s0s1 = "10" THEN y <= c; ELSE y <= d; END IF; END PROCESS; END ARCHITECTURE if_mux41; (2)编译的结果如下:

编译报告: 二、解法2:用CASE语句实现4选1多路选择器(1)程序: LIBRARY IEEE; USE IEEE.STD_LOGIC_1164.ALL; ENTITY mux41 IS PORT (a,b,c,d: IN STD_LOGIC;

《药剂学》单项选择题习题及答案

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题目:不能制成胶囊剂的药物是( )。 答案a 牡荆油 答案b 芸香油乳剂 答案c 维生素ad 答案d 对乙酰氨基酚 正确答案:b 题目:可用于制备缓、控释片剂的辅料是( )。 答案a 微晶纤维素 答案b 乙基纤维素 答案c 乳糖 答案d 硬脂酸镁 正确答案:b 题目:下列哪项是常用防腐剂( )? 答案a 氯化钠 答案b 苯甲酸钠 答案c 氢氧化钠 答案d 亚硫酸钠 正确答案:b 题目:溶液剂制备工艺过程为( )。 答案a 药物的称量→溶解→滤过→灌封→灭菌→质量检查→包装 答案b 药物的称量→溶解→滤过→质量检查→包装 答案c 药物的称量→溶解→滤过→灭菌→质量检查→包装 答案d 药物的称量→溶解→灭菌→滤过→质量检查→包装 正确答案:b 题目:单糖浆含糖量(g/ml)为多少( )? 答案a 85% 答案b 67% 答案c 64.7% 答案d 100% 正确答案:a 题目:乳剂的制备方法中水相加至含乳化剂的油相中的方法( )。 答案a 手工法 答案b 干胶法 答案c 湿胶法 答案d 直接混合法 正确答案:b 题目:下列哪种物质不能作混悬剂的助悬剂( )? 答案a 西黄蓍胶 答案b 海藻酸钠 答案c 硬脂酸钠 答案d 羧甲基纤维素 正确答案:c 题目:根据stokes定律,混悬微粒沉降速度与下列哪个因素成正比( )。答案a 混悬微粒半径

四选一多路选择器

四选一选择器的VHDL程序实现及仿真 一、四选一选择器的基本功能描述 选择器常用于信号的切换,四选一选择器常用于信号的切换,四选一选择器可以用于4路信号的切换。四选一选择器有四个输入端input(0)~ input(3),两个信号选择端a和b及一个信号输出端y。当a、b输入不同的选择信号时,就可以使input(0)~ input(3)中某一个相应的输入信号与输出y端接通。例如,当a=b=“0”时,input (0)就与y接通。 四选一电路的逻辑功能真值表如下图所示: 我们可以根据上面的逻辑真值表,设计四选一电路系统的VHDL 源程序,并进行程序的编译和仿真。 二、编写VHDL源程序 下面为四选一选择器的VHDL源程序: 四选一选择器VHDL源程序如下: LIBRARY IEEE; ***库的调用***

USE IEEE.STD_LOGIC_1164.ALL; ***库的调用*** ENTITY mux4 IS ***实体定义*** PORT (input:IN STD_LOGIC_VECTOR(3 DOWNTO 0); ***输入管脚的定义*** a,b:IN STD_LOGIC; ***输入管脚的定义*** y:OUT STD_LOGIC ); ***输出管脚的定义*** END mux4; ARCHITECTURE rtl OF mux4 IS ***结构的定义*** SIGNAL sel:STD_LOGIC_VECTOR (1 DOWNTO 0); ***信号定义*** BEGIN sel<=b&a; PROCESS (input,sel) ***进程的定义*** BEGIN IF(sel="00") THEN y<=input(0); ELSIF(sel<="01") THEN y<=input(1); ELSIF(sel<="10") THEN y<=input(2); ELSE y<=input(3); END IF; END PROCESS; END rtl; 三、文本文件的编译及仿真全过程 在编辑器中输入并保存了以上四选一选择器的VHDL源程序后就可以对它进行编译了,编译的最终目的是为了生成可以进行仿真、定时分析及下载到可编程器件的相关文件,如*.cnf,*.rpt,*.snf,*.pof 等。 具体编译过程如下: 1、输入完以上全加器的源程序后,进入File/Project子菜单,选择Name 项,在工程名(Project name)对话框中输入mux4.vhd,按OK按钮;再在相同的子菜单中选择Set Project to Current File项; 2、进入MAX+plus Ⅱ菜单,在出现的子菜单中选择Compiler选项,

初中英语单项选择题汇总题(附标准答案)

初中英语单项选择题汇总题(附答案)

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初中英语单项选择题汇总(附答案) 第一部分初中中考英语单选题真题练习 第一章冠词 真题 1. —What would you like for afternoon tea? (09广州,16) —Tow pieces of bread and cup of coffee, please. A. an; a B. 不填; a C. at; the D. 不填; the 2. old man behind Mary is university teacher. (09广东省,29) A. An; an B. A; the C. The; a D. The; an 3. —How do you go to work? (09深圳,1) —I usually take bus. A. the; a B. /; a C. a; a D. the; / 4. After Lucy and Lily, Tony is now student to win the game in our class. (09佛山,23) A. the third B. a third C. the second 5. —Are you good at playing basketball or playing piano? (08深圳,21) —Both. A. a; a B. the; the C. the; / D. /; the 6. When you make a mistake, don't always make excuse for yourself. (08佛山, 29) A. an B. the C. / 7. —Do you like a blue bike for your birthday? (07佛山,31) —But I prefer green one. A. the B. / C. a 8. He is university student and he comes from island in England. (07广东省,26) A. an; an B. an; a C. a; an D. a; a 巩固练习 1.There's 800-metre-long road behind hospital. (09甘肃兰州) A. an; an B. a; a C. an; the D. a; the 2.I really like book you lent me yesterday. (09河北) A. a B. an C. the D. 不填 3.Jimmy bought car yesterday, but it’s used one. (09山东威海) A. a; a B. a; an C. a; the D. the; an 4.What exciting news it is! Is news true? (09山东烟台) A. an; the B. an; a C. /; the D. /; a 5.—I just have cup of milk for breakfast. (09四川成都) —That’s not enough. A. a; a B. the; the C. a; 不填 6.Sandy often takes her dog for walk around the lake after supper. (09江苏南京)

互换性习题单项选择题及答案

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八选一数据选择器和四位数据比较器verilog实验报告)

Verilog HDV 数字设计与综合 实验报告 微电子0901班 姓名:袁东明 _ 学号:_04094026 一、实验课题: 1.八选一数据选择器 2.四位数据比较器 二、八选一数据选择器Verilog程序: 2.1主程序 module option(a,b,c,d,e,f,g,h,s0,s1,s2,out); input [2:0] a,b,c,d,e,f,g,h; input s0,s1,s2; output [2:0] out; reg [2:0] out; always@(a or b or c or d or e or f or g or h or s0 or s1 or s2) begin case({s0,s1,s2}) 3'd0 : out=a;

3'd1 : out=b; 3'd2 : out=c; 3'd3 : out=d; 3'd4 : out=e; 3'd5 : out=f; 3'd6 : out=g; 3'd7 : out=h; endcase end endmodule 2.2激励程序 module sti; reg [2:0] A,B,C,D,E,F,G,H; reg S0,S1,S2; wire [2:0] OUT; option dtg(A,B,C,D,E,F,G,H,S0,S1,S2,OUT); initial begin A=3'd0;B=3'd1;C=3'd2;D=3'd3;E=3'd4;F=3'd5;G=3'd6;H=3'd7;S0=0;S1=0;S2=0; #100 A=3'd0;B=3'd1;C=3'd2;D=3'd3;E=3'd4;F=3'd5;G=3'd6;H=3'd7;S0=0;S1=0;S2=1; #100 A=3'd0;B=3'd1;C=3'd2;D=3'd3;E=3'd4;F=3'd5;G=3'd6;H=3'd7;S0=0;S1=1;S2=0; #100 A=3'd0;B=3'd1;C=3'd2;D=3'd3;E=3'd4;F=3'd5;G=3'd6;H=3'd7;S0=0;S1=1;S2=1; #100 A=3'd0;B=3'd1;C=3'd2;D=3'd3;E=3'd4;F=3'd5;G=3'd6;H=3'd7;S0=1;S1=0;S2=0; #100 A=3'd0;B=3'd1;C=3'd2;D=3'd3;E=3'd4;F=3'd5;G=3'd6;H=3'd7;S0=1;S1=0;S2=1;

VHDL实验报告一2选1多路选择器

实验一 实验目的: 熟悉quartus的vhdl文本设计流程全过程,学习简单的组合电路的设计,多层次的电路设计,仿真和硬件测试 二、实验内容 内容(一)用vhdl语言设计2选1多路选择器 参考例3-1程序设计如下: library ieee; use mux21a is port (a,b,s:in bit; y: out bit); end entity mux21a; architecture one of mux21a is begin y<=a when s='0' else b; end architecture one 全程编译后软件提示0错误,3警告,可以继续下面仿真操作。 程序分析: 这是一个2选1多路选择器,a和b分别为两个数字输入端的端口名,s为通道选择控制信号输入端的端口名,y为输出端的端口名。 时序仿真及分析: 时序仿真输入图: 时序仿真输出图: 时序分析: 由上面两图可以得知:当s=0时,y口输出a,当s=1时,y口输出b 下载和硬件测试: 引脚锁定图: 程序下载完成后,选择实验电路模式5,通过短路帽选择clock0接256Hz 信号,clock2接8Hz信号。通过键一控制s,当键一进行切换时,明显能听到扬声器发出两种不同音调的声音。 实验内容(二)双二选一多路选择器设计

程序设计: library ieee; use mux21a is port (a,b,s:in bit; y: out bit); end entity mux21a; architecture one of mux21a is begin y<=a when s='0' else b; end architecture one; entity muxk is port (a1,a2,a3,s0,s1:in bit; outy:out bit); end entity muxk; architecture bhv of muxk is component mux21a port (a,b,s:in bit; y:out bit); end component; signal tmp: bit; begin u1:mux21a port map(a=>a2,b=>a3,s=>s0,y=>tmp); u2:mux21a port map(a=>a1,b=>tmp,s=>s1,y=>outy); end architecture bhv; 全程编译后软件提示0错误,2警告 程序分析: 这是一个双2选1多路选择器,a1、a2和a3分别为两个数字输入端的端口名,s0、s1为通道选择控制信号输入端的端口名,outy为输出端的端口名。实体mux21a是一个2选一选通电路,实体muxk是元件的例化,其作用是将两个mux21a组合成一个3选1多路选择器。 时序仿真及分析: 时序仿真输入图 时序仿真输出图 时序分析: 从仿真出来的结果,我们不难发现,s0和s1做为a1、a2、a3的选通控制信号。当s0=0.、s1=0时,outy输出a1;当s0=0.、s1=1时,outy输出a2;当s0=1.、s1=0时,outy输出a1;当s1=1.、s2=1时,outy输出a3; 下载和硬件测试: 引脚锁定图

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