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高二朱锃桓专练学生版

高二数学专练

1.对于直角坐标平面内的任意两点()()1122,,,A x y B x y ,定义它们之间的一种“距离”：

给出下列三个命题:

①若点C 在线段AB 上,

②在ABC 中,若90C ∠=,

③在ABC 中, 其中真命题的个数为

A ． 0

B ． 1

C ． 2

D ． 3

2120x x +>是()()()()1212f x f x f x f x +>-+-的 ( )

A ．充分不必要条件

B ．必要不充分条件

C ．充要条件

D ．既不充分也不必要条件

3．设命题 :实数满足 ,其中 ;命题 :实数满足 .

(1)若 ,且为真,求实数的取值范围;

(2)若是的充分不必要条件,求实数的取值范围.

4．如图所示，某镇有一块空地OAB ?，其中3OA km =， 90AOB ∠=。当地镇政府规划将这块空地改造成一个旅游景点，拟在中间挖一个人工湖OMN ?，其中

,M N 都在边AB 上，且30MON ∠=，挖出的泥土堆放在OAM ?地带上形成假山，剩下的OBN ?地带开设儿童游乐场. 为安全起见，需在OAN ?的周围安装防护网.

（1 （2）若要求挖人工湖用地OMN ?的面积是堆假山用地OAM ?的面积的AOM ∠ 的大小；

（3）为节省投入资金，人工湖OMN ?的面积要尽可能小，问如何设计施工方案，可使OMN ? 的面积最小？最小面积是多少？

5如图所示的自动通风设施.该设施的下部ABCD 是等腰梯形，其中AB 为2米，梯形的高为1米， CD 为3米，上部CmD 是个半圆，固定点E 为CD 的中点. MN 是由电脑控制可以上下滑动的伸缩横杆（横杆面积可忽略不计），且滑动过程中始终保持和CD 平行.当MN 位于CD 下方和上方时，通风窗的形状均为矩形MNGH （阴影部分均不通风）. （1）设MN 与AB 之间的距离为x （且1x ≠）米，试将通风窗的通风面积S （平方米）表示成关于x 的函数()y S x =；

中考英语选词填空技巧

选词填空技巧教案一、选词填空的练习分析二、选词填空的常考知识点三、选词填空的技巧一、选词填空的例题练习分析 Bob and David are good friends, but they like to joke on each other sometimes. One day they went to London for their holidays. They went to the (1)___________and bought their tickets. When the train arrived, Bob got on the train first, but he dropped his (2)_______________ on the platform(站台）without knowing it. David was behind him and quickly (3) _________it up. Without saying a word to his friends, he put it in his (4)_______After they had been in the (5) _________for a little while, they saw the conductor(列车员）coming along, shouting,“ Ticket, please!” Bob(6)__________ for his and of course he couldn’t find it.“ Oh, dear, I can’t (7)__________ my ticket, David.” he said. “Have another look, Bob; it must be (8)___________”said David.“No, I can’t find it anywhere. What shall I do ?”“Perhaps you’d better hide under the(9)___________so that the conductor won’t see you.”So Bob crawled(爬）under the seat and lay there quietly. Soon the conductor stood in front of David.“Ticket, please.” he said.David handed him (10) __________tickets and said, “This is mine. The other is my friend’s. He prefers to travel under the seat.” 1，2，4，5，9根据上下文意思填名词。3，6，7，8根据上下文意思填入动词，并注意动词的形式及语态。10考数词。二、选词填空的常考知识点 1、名词新课程标准要求初中毕业生要掌握1500-1600个单词,200-300个词组和短语；名词需要注意单复数 2、动词动词的时态及语态。动词的时态：一般现在时、一般过去时、一般将来时、现在进行时、现在完成时、过去进行时、过去完成时、过去将来时。动词的语态（动词的主动语态及被动语态）。 3、数词：基数词和序数词的转化（结合语境提示例如one，the other可推出two tickets） 4、副词（结合语境） 5、介词（固定搭配） 6、代词：（人称代词主格、宾格的转化；人称代词、形容词性物主代词和名词性物主代词的转化）；固定搭配：each of（每个）

上海中考英语新题型专项练习——选词填空

【揭秘奉献】2012上海中考英语新题型精练（共9套）2012年上海中考英语题型已确定，词汇与语法部分新增选词填空题，根据文章意思，选择方框中最恰当的词语，不需要进行词性转换。但也增加不少难度，首先需要读懂文章，才能选择最正确的词，以下为2012年上海中考英语新题型选词填空专项练习，供学生学习参考。 2012年上海中考英语新题型专项练习——选词填空1 destroy(毁坏) whole cities. First, it is not a 1 .________ idea to build houses along lines where 2. ________ of the earth's plates(板块) join together. Second, if you think there 3. ________ be an earthquake, it is better to build houses on rocks , not on 4. ________. Third, you must make the houses as 5. ________ as possible. Weak buildings will fall down in an earthquake, but strong ones may 6. ________ Scientists are 7. ________ that one day an even bigger earthquake will hit the part around San Francisco(旧金山) . They call it " The Big One ". However, people today are still building more 8. ________ . The population in and around San Francisco is 9. ________ ten times more than it was in 1906. This means that 10. ________ there is another earthquake, a great many houses and buildings will be destroyed. 参考答案： 1.good 2.two 3.may 4.sand 5.strong 6.stayup 7.afraid 8.houses 9.now 10.if 2012年上海中考英语新题型专项练习——选词填空2 forget, bring，mend，beside，luck，pick，same，differently, I ，every , stop，each Mr. Brown had an umbrella shop in a small town. People sometimes 1 ________ him

选词填空专练

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选词填空专项练习

选词填空——专项练习 Passage 1. Some years ago I was offered a writing assignment that would require three month of travel though Europe's had been aboard a couple of times, but I could hardly _____to know my way around the continent. Moreover, my knowledge of foreign languages was ______ to a little college French. I hesitated. How would I, unable to speak the language, ______ unfamiliar with local geography or transportation systems, set up _______ and do research? It seemed impossible, and with considerable ______. I sat down to write a letter begging off. Halfway through, thought ran through my mind: you can't learn if you don't try. So I accepted the assignment. There were some bad _______. But by the time I had finished the trip I was an experienced traveler. And ever since, I have never hesitated to head for even the most remote of places, without guides or even _______ bookings, confident that somehow I will manage. The point is that the new, the different, is almost by definition _____. But ach time you try something, you learn, and as the learning piles up, the world opens to you. I've learned to ski at 40, and flown up the Rhine River in a ______. And I know I'll go on doing such things. It's not because I'm braver or more daring than others. I'm not, but I'll accept anxiety as another name for challenge and I believe I can _______ wonders. Passage 2. To call something "marginal" means it is not very good. Farmers have their own way to 47 marginal and: It is the last to be planted under good conditions, and has the 48 to be avoided under poor conditions. Low 49 soil is not the only reason land could be considered marginal. It might be in an area where rainfall is 50 or where a hillside might rise too steeply (陡峭地）. There are uses for marginal and, however. Most often it is used as grassland. Grasses provide excellent 51 for grazing(吃草）animals like cattle, sheep and goats. Grass seed can be bought

中考英语_选词填空专项练习

2010中考英语综合填空专练 ( A ) 根据句子的意思，从方框中选择恰当的单词并用其正确的形式填空，每空一词。 1.The _____ on the ground are still alive. 2.Tom's parents are very _____ to Tom's classmates. 3.Liu Xiang is _____ as a sporting hero in the world. 4.The family which has _____ children is easier to live. 5.Her eyes were _____ with tears when she got the bad news. 6.A serious traffic accident _____ at the second crossing of the street last night. 7.You'd better _____ the cold meat before you eat. 8.They _____ from London to New York last week. 9.You have to _____ him to finish the work by noon. 10.All the _____ are interested in Chinese culture. ( B ) 1.More and more sporting _____ have appeared recently. 2.You are _____ if you don't accept others' correct ideas.

中考英语复习选词填空专项练习

选词填空专项练习请根据句意从方框中选择合适的动词，并用其适当形式填空，使句子通顺。 (一) 1. Like the Earth，Mars(火星) also _____________ around the sun. 2. It is very impolite to talk loudly while people ________in the library. 3. The boy _______ Coke to water when he was very young. 4. -—Why are you so happy today? — Because our team _____________the volleyball match 5 --- I heard lots of noise from your group，Suzy. --- Oh，sorry to disturb you. We _____________ the history project at that time. (二) 1.He______________________________ a stuntman before he became a actor. 2.When she was a little girl，she ___________________________ being a dancer. 3.She _________________________________________________ before she got married. 4.The band played many songs，___________________some of my favourites. 5.Hepburn devoted her last few years to _______________________________with UNECEF. 6.Though I like the house very much，its price ___________________________ my ability to pay. 7.The little boy saved every coin _________ he could buy his mother a present on Mother’s day. 8.When we arrived at the cinema，the film _________________________ for 10 minutes. 9.Michael Jackson’s death was a great ________________________to the music industry. 10.The story seems ____________________________________________ mysteries. (三) 1. He cut out a picture of a lovely bear and__________it on the cover. 2. Not only his classmates but also he _________kites on the playground every Sunday. 3. There __________ an interesting film tonight，isn’t there? 4. John，_____________your son how to make a home page for yourself. 5. Amy with her cousin _____________ a trip to the West Lake tomorrow，isn’t she? (四) What do students1about fast-food restaurants in our city? We did a 2 of the students in our school last week and this is 3 we learned. Most of the students think all fast-food restaurants are good，but the KFC is the4in our city. It has the most creative food and the best5. However，

2020年中考英语选词填空练习试题(含答案)

2020年中考英语选词填空练习 I think senior high schools should have the right to hold independent recruitment(自主招生). According to current regulations (规定), 1______ are being picked by schools according to 2_______ scores on the senior high school entrance exam. This is 3______ because the government wants students 4_______ equal education. But I believe independent recruitment should still 5_______. If an excellent student does poorly 6______ the entrance exam, what can he or she do if there are no other exams offered by schools? This is 7______ for such students. Their future should not be decided by 8_______ one exam. Also, some students in remote (偏僻的) areas don’t have as much access (机会) to 9________ resources. When taking the same entrance exam as students living in more 10_______ areas, they are at a disadvantage (劣势). Independent recruitment may provide these students with a chance to get enrolled (录取). China Youth Daily recently carried out an online survey of 1,934 people to find out more about their lives at home. 1______ of the respondents (受访者) were between the 2______ of 18 and 35. The survey 3________ that 73.5 percent of these young respondents said they want 4______ the same hobbies as their parents. While most young people 5_______ to watch TV, take photos or go 6______, their parents might prefer to watch Peking Opera, drink tea 7______ play chess. While being quarantined (隔离) at home during the coronavirus outbreak, however, they started to share each 8______ interests. “By learning 9_______ each others’ interests, parents and their children might find things that they have in common and have 10_______ relationships,” said Shen Yifei, a professor from Fudan University. C

中考英语选词填空练习

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选词填空专练

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英语四级选词填空专练

《1》Years ago, doctors often said that pain was a normal part of life. In particular, when older patients ____36____ of pain, they were told it was a natural part of aging and they would have to learn to, live with it. Times have changed. Today, we take pain ____37____. Indeed, pain is now considered the fifth vital, as important as blood pressure, temperature, breathing rate and pulse in ____38____a person's well-being. We know that chronic(慢性的) pain can disrupt (扰乱的) a person's life, causing problems that ____39 ____ from missed work todepression. That's why a growing number of hospitals now depend upon physicians who ____40____ in pain medicine. Not onlydo we evaluate the cause of the pain, which can help us treat the pain better, but we also help providecomprehensive therapy for depression and other psychological and social ____41____ related to chronic pain. Suchcomprehensive therapy often ____42 ____ the work of social workers, psychiatrists (心理医生) and psychologists, aswell as specialists in pain medicine. This modem ____43____ for pain management has led to a wealth of innovative treatments which are more effectiveand with fewer side effects than ever before. Decades ago, there were only a ____44 ____number of drugs available, andmany of them caused ____45 ____ side effects in older people，including dizziness and fatigue. This created a double-edged sword: the medications helped relieve the pain but caused other problems that could be worse than the painitself. A.result B.involves C.significant D.range E.relieved F.issues G.seriously H.magnificent I.determining J.limited K.gravely https://www.wendangku.net/doc/a313015794.html,plained M.respect

高二朱锃桓 专练学生版

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