四川省眉山一中2017-2018学年高一英语下学期期中试题

眉山一中办学共同体2020届高一下期期中考试数 学命题 审题一. 选择题：本大题共12小题，每小题5分，在每小题给出的四个选项中，只有一项是符合题目要求的。

1.化简 =+- （ ）A ．0B ．C ．2D ．22．在等差数列{a n }中，已知a 3 = 5，a 7 =－7，则a 11的值为 （ ）A ．2B ．5C ．－19D ．－16 3.在锐角△ABC 中,角A B C 、、所对应的边分别为,,a b c ，若2sin b a B =则角A 等于( )A. 30oB. 45oC. 60oD. 75o4.已知向量＝(1，2)，＝(1，0)，＝(3，4).若λ为实数，(＋λ)∥，则λ等于( ) A . 14B . 12C. 1D .25.在等比数列{a n }中，a 2=2，a 5=16，记{a n }的前n 项和为Sn ，则S 6=（ ）A .31 B. 32 C. 64 D. 636．在正六边形ABCDEF 中，若AB ＝1，则|AB →＋FE →＋CD →|等于( )A ．1B ．4C ．3D ．27.在ABC ∆中，角A 、B 、C 所对应的边分别为a 、b 、c ，若角A 、B 、C 依次成等差数列，且1,ABC a b S ∆==则=（ ）A B C D ．2 8.已知数列{a n }满足751-=+n n a a ，且51=a ，设{a n }的前n 项和为n S ，则使得n S 取得最大值的序号n 的值为( )A.7B.8C.7或8D.8或99.已知等比数列{}n a 的各项都为正数, 且3a ，521a ，4a 成等差数列,则3546a a a a ++的值是 （ ） ABC ．D10.已知△ABC 外接圆的半径为R ，角A ，B ，C 所对的边分别是a ，b ，c 且B b aC A R sin )2()sin (sin 222-=-，那么角C 的大小为( )A30 B.60° C.45° D.90°11.在△ABC 中，若|AB →＋AC →|＝|AB →－AC →|，AB ＝2，AC ＝1，E ，F 为BC 边的三等分点，则AE →·AF→＝( )A.89B.109C.259D.26912.下列命题：①在ABC ∆中，若π43=+B A ，则2)tan 1)(tan 1(=--B A ；②已知a =（1，-2），b =（2，λ）且 a 与b 的夹角为锐角，则实数λ的取值范围是1λ<；③已知O 是平面上一定点，AB C ，，是平面上不共线的三个点，动点P 满足)(++=λ,(0)λ∈+∞，，则P 的轨迹一定通过ABC △的重心； ④在ABC ∆中，60A ∠=，边长,a c分别为4,a c ==ABC ∆只有一解 其中正确命题的个数A 1 B.2 C.3 D.4 二、填空题：本大题共4小题，每小题5分。

2020届高一英语1月月考试卷第Ⅰ卷（选择题）第一部分听力（共两节，满分20分）第一节（共5小题；每小题1分，满分5分）听下面5段对话。

每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。

听完每段对话后，你都有10秒钟的时间来回答有关小题如阅读下一小题。

每段对话仅读一遍。

1. What will the man do during the vacation?A. Work in a clothes store.B. Travel around with Sam.C. Go to the countryside.2. What’s the probable relationship between the speakers?A. Husband and wife.B. Customer and waitress.C. Workmates.3. How does the woman sound?A. Excited.B. Confused.C. Annoyed.4. What does the woman think Tom needs?A. Punishment.B. Suggestions.C. Encouragement.5. Where does the woman find her mobile phone?A. On the table.B. On the chair.C. In her bag.第二节（共15小题；每小题1分，满分15分）听下面5段对话或独白。

每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。

听每段对话或独白前，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题将给出5秒钟的作答时间。

每段对话或独白读两遍。

听下面一段对话，回答第6和第7两个小题。

6. What day is it today?A. Thursday.B. Friday.C. Saturday.7. What is the woman going to do first?A. Call Mark’s parents.B. Exchange tickets.C. Watch a match. 听下面一段对话，回答第8和第9两个小题。

四川省眉山市2017-2018学年高一英语上学期期中试题第Ⅰ卷(选择题）第一部分听力（共两节，满分20分）第一节（共5小题；每小题1分，满分5分）听下面5段对话.每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。

听完每段对话后，你都有10秒钟的时间来回答有关小题如阅读下一小题。

每段对话仅读一遍。

1。

What does the woman want to do？A. Rent a car.B. Get a license.C. Change a card。

2. Whom does the woman suggest the man speak to？A。

Mr. Brown。

B. Mr. Smith. C。

Mrs。

Brown。

3.What's wrong with the woman？A. She locked herself in the apartment.B. She forgot to change her lock.C. She couldn’t find her keys。

4. When w as James’ plane supposed to arrive？A。

At 1:50。

B. At 2：10. C. At 2：45. 5。

What does the woman say about the meeting?A。

It will begin as scheduled.B。

It is brought forward。

C。

It has been canceled.第二节(共15小题；每小题1分，满分15分)听下面5段对话或独白。

每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。

听每段对话或独白前，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题将给出5秒钟的作答时间。

每段对话或独白读两遍。

集宁一中2017—2018 学年第二学期期中考试高一年级英语试题本试卷满分为120分，考试时间100分钟第I卷（选择题共70分）第一部分阅读理解（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下面短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。

AMeganI have a small apartment there. The thing I like most about my job is the chance to meet people from different cultures. I spend a lot of my time handing out food and drinks and clearing up people’s rubbish. I certainly don’t feel very excited about going home at two in the morning. FrankI enjoy playing around with word puzzles. So I sent a couple in to a local newspaper and I suppose it is a strange way to spend your day surrounded by dictionaries and books, but it’s great because I’m just doing what I like.GemmaI love music and listen to it all the time, even when I go jogging. As for my job – you really can’t be shy in this kind of work, and you have to be very patient because sometimes we practice for hours before we get it right. When we’re on tour, we work for several weeks with no breaks and you can get really tired. For relaxation, whenever I get a holiday, I go straight to a sunny beach. RaoulMost people think I spend my day chopping (切) vegetables and washing dishes, but it’s not that simple. I have to be really careful with the food and keep everything very clean. The biggest problem is my boss – he shouts at me all the time – even, for example, if I forget to wash up one plate. Actually, I’m hoping to find a new job soon because I don’t get much time off.1. What’ s the biggest attractions of Megan’s job?A. The long holidaysB. Handing out food to people.C. Getting to know different peopleD. The pleasant working environment2. Who love working with words?A. MeganB. FrankC. GemmaD. Raoul3. What problem does Raoul face?A. His strict bossB. He is carelessC. His terrible cookingD. He fails to get enough sleepBFor some children, the news on TV can be difficult to understand. Don’t worry! Here comes Linda Ellerbee. She is a well-known journalist (记者）behind Nick News, a special TV program for kids. As the show’s creator and reporter, Ellerbee talks about the news in a way that’s easy for children to understand.This month, Nick News celebrated its 20th birthday. It is the longest running TV news program for kids. When asked why she started Nick News , Ellerbee’s answer is simple. “Kids have rights(权利）to know,” she says. “And they already do know, but maybe not all the facts.” She looks at her job on Nick News as more than news and help children understand what has really happened.Ellerbee tries to balance bad news with good news, too. “Behind each sad story, there’s always someone or something trying to make it better,” she explains.Besides important events, Nick News also reports the things that are going on in the world of kids. When deciding what to talk about in the program, Ellerbee says, “We think: What big events are kids unable to avoid(避免）? What are they already hearing about? What can we help them understand better?4. Nick News is special because of _____.A. the time it beginsB. the news it reportsC. the way it collects the newsD. the way it tells children the news5. What do we know about Nick News?A. It mainly reports exciting news.B. It is a new program made by Ellerbee.C. It teaches children how to make the news.D. It helps children learn about the news.6. What is Ellerbee’s attitude toward her job?A. She takes it seriously.B. She thinks it pays well.C. She finds it a bit boring.D. She’s not interested in it.7. The last paragraph mainly talks about______.A. why children like Nick NewsB. how Ellerbee understand newsC. what topics Nick News coversD. different kinds of news programsCEdmund Halley, an astronomer in the late 1600s, was very interested in comets（彗星）. In 1682, he noticed a comet that was especially bright and large. He spent a long time studying it. Then it disappeared from view. Based on his research, Halley guessed that this bright comet would return in 1758 or 1759. This was about 75 years after he first saw the comet. This same bright comet returned right on time. However, Halley died in 1742 and was unable to see it. Not long after that, the comet was named “Halley’s comet” in his honor.Scientists who had been following Halley’s work began to look back throu gh history. They learned that for centuries there had been mention of a comet in the sky about every 75 years, going all the way back to 467 B.C. Often, the return of Halley’s comet seemed to coincide (同时发生) with important events in history. For many years people believed that Halley’s comet caused catastrophes (大灾难), from sickness to war.Now, scientists know that comets do not cause bad events, and they have learned more about comets. All comets are made of a head and a tail. Some comets have longer tails. The head is made mostly of ice, plus some dust and pieces of rock. U.S. astronomer Fred Whipple used the phrase “dirty snowballs” to describe comets. Comets move through the sky very quickly. However, their speed depends on how close they are to the Sun. When Halley’s comet is farthest from the Sun, it moves about 2,040 miles per hour. When it is closest to the Sun, it moves at an amazing 122,000 miles per hour!People today remain attracted by this comet. The most recent visit from Halley’s comet was in 1985-1986. This time, two spacecraft, Vega 1 and Vega 2, got a close look at the comet as it raced around the Sun. Halley’s comet should next return in 2061. Who knows what high-tech equipment will be around to study it then?8. From the first paragraph, we can learn that _____.A. Halley saw the same comet twice in his lifeB. Halley had known a lot about comets before 1682C. Halley named the comet he found “Halley’s comet”D. Halley’s guess about the comet’s return proved correct9. In ancient times, peo ple often considered Halley’s comet_____.A. a star bringing bad luckB. a star worth seeingC. a star with a high temperatureD. a star visiting the Earth once in a lifetime10. The third paragraph mainly tells us _____.A. what comets are likeB. where comets can be seenC. why comets fly at high speedsD. how long it takes comets to circle around the Sun11. The question in the last paragraph mainly shows _____.A. high-tech equipment is needed to study Halley’s cometB. research on Halley’s comet will never be overC. people expect to see the return of Halley’s comet more oftenD. people are ready for the return of Halley’s comet in 2061DMy husband and I have always been friendly with the clerks at the local convenience store where we often get petrol. I don't think people appreciate what a difficult job these people have sometimes. They work for a little money and I often wonder how they make ends meet.One of the clerks, Charlie，was missing her glasses one day, and she said they'd been broken and that she couldn't afford a new pair. It was obvious that she was having a difficult time.We wondered how we could help, so turned to our own eye doctor for help with a plan. We had his secretary contact her, asking her to come in for an eye exam free of charge. We told the doctor to let her order whatever glasses she wanted and that we would pay for them. Although Charlie questioned what was going on, the doctor just told her that someone had anonymously(用匿名的方式) paid the money for her new glasses. When we went in to pay the bill, the doctor told us he was so touched by our idea that he waived the exam fee(费用) and only charged us for half the price of the glasses!It was so wonderful to see Charlie in her new glasses and she enjoyed telling all the customers how it took place. I'm sure that upon hearing her story, ideas of kindness may have appeared in the minds of many. She will never know who the gift was from but I think the thing was planted for her.12．Why didn't the clerk “Charlie” wear glasses one day?A. A pair of glasses was too expensive for him.B. Her old glasses were broken.C. Her glasses were missing.D. She forgot to wear glasses.13．From the passage, we can infer that________.A．Charlie was a young manB．Charlie knew who paid money for the new glassesC．The Charlie's income was very littleD．Charlie must have known who offered the help14．The underlined word “waived” in the third paragraph can be replaced by________.A. gave upB. took upC. turned upD. put off15．The best title of the passage should be________.A. The Hard TimesB. Customer's Gift to an EmployeeC. A Friendly Clerk—CharlieD. A kind Doctor第二节（共5小题，每小题2分，满分10分）根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。

四川省眉山一中办学共同体2018-2019学年高一英语上学期期中试题英语试题卷共12页。

满分150分。

考试时间120分钟。

注意事项：1．答题前，务必将自己的姓名、准考证号填写在答题卡和答题卷规定的位置上。

2．答选择题时，必须使用2B铅笔将答题卡上对应题目的答案标号涂黑，如需改动，用橡皮擦擦干净后，再选涂其他答案标号。

3．答非选择题时，必须使用0.5毫米黑色签字笔，将答案书写在答题卷规定的位置上。

4．所有题目必须在答题卷上作答，在试题卷上答题无效。

5．考试结束后，将答题卷交回。

第Ⅰ卷（选择题共100分）第一部分听力（共两节，满分30分）做题时，请先将答案划在试题卷上。

录音内容结束后，你将有两分钟的时间将试题卷上的答案转涂到答题卡上。

第一节(共5小题；每小题l.5分, 满分7.5分)听下面5段对话。

每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。

听完每段对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。

每段对话仅读一遍。

1. What kind of food did the man suggest?A. French food.B. Chinese food.C. Italian food.2. What is wrong with the man?A. He has a cold.B. He can’t sleep well at this time of the year.C. He is not very comfortable with the flowers.3. What does the man mean?A. He already tried that suggestion.B. He already bought something.C. He hadn’t considered that idea.4. Why can’t the man give the woman a ride?A. His car is being repaired.B. He is riding the company bus.C. He isn’t going into town.5. Where are the speakers?A. In the woman’s home.B. At a French café.C. In a supermarket.第二节听下面5段对话或独白。

四川省眉山市2017-2018学年高一英语上学期期中试题第Ⅰ卷（选择题）第一部分听力（共两节，满分20分）第一节（共5小题；每小题1分，满分5分）听下面5段对话。

每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。

听完每段对话后，你都有10秒钟的时间来回答有关小题如阅读下一小题。

每段对话仅读一遍。

1. What does the woman want to do?A. Rent a car.B. Get a license.C. Change a card.2. Whom does the woman suggest the man speak to?A. Mr. Brown.B. Mr. Smith.C. Mrs. Brown.3.What's wrong with the woman?A. She locked herself in the apartment.B. She forgot to change her lock.C. She couldn't find her keys.4. When was James' plane supposed to arrive?A. At 1:50.B. At 2：10.C. At 2：45.5. What does the woman say about the meeting?A. It will begin as scheduled.B. It is brought forward.C. It has been canceled.第二节（共15小题；每小题1分，满分15分）听下面5段对话或独白。

每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。

听每段对话或独白前，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题将给出5秒钟的作答时间。

2020届高一英语半期考试卷第Ⅰ卷（选择题）第一部分听力（共两节，满分20分）第一节（共5小题；每小题1分，满分5分）听下面5段对话。

每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。

听完每段对话后，你都有10秒钟的时间来回答有关小题如阅读下一小题。

每段对话仅读一遍。

1. What does the woman want to do?A. Rent a car.B. Get a license.C. Change a card.2. Whom does the woman suggest the man speak to?A. Mr. Brown.B. Mr. Smith.C. Mrs. Brown.3.What's wrong with the woman?A. She locked herself in the apartment.B. She forgot to change her lock.C. She couldn't find her keys.4. When was James' plane supposed to arrive?A. At 1:50.B. At 2：10.C. At 2：45.5. What does the woman say about the meeting?A. It will begin as scheduled.B. It is brought forward.C. It has been canceled.第二节（共15小题；每小题1分，满分15分）听下面5段对话或独白。

每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。

听每段对话或独白前，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题将给出5秒钟的作答时间。

每段对话或独白读两遍。

听下面一段对话，回答第6和第7两个小题。

四川省眉山市2017-2018学年高一英语上学期期中试题第Ⅰ卷（选择题）第一部分听力（共两节，满分20分）第一节（共5小题；每小题1分，满分5分）听下面5段对话。

每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。

听完每段对话后，你都有10秒钟的时间来回答有关小题如阅读下一小题。

每段对话仅读一遍。

1. What does the woman want to do?A. Rent a car.B. Get a license.C. Change a card.2. Whom does the woman suggest the man speak to?A. Mr. Brown.B. Mr. Smith.C. Mrs. Brown.3.What's wrong with the woman?A. She locked herself in the apartment.B. She forgot to change her lock.C. She couldn't find her keys.4. When was James' plane supposed to arrive?A. At 1:50.B. At 2：10.C. At 2：45.5. What does the woman say about the meeting?A. It will begin as scheduled.B. It is brought forward.C. It has been canceled.第二节（共15小题；每小题1分，满分15分）听下面5段对话或独白。

每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。

听每段对话或独白前，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题将给出5秒钟的作答时间。

哈尔滨市第六中学2017-2018学年度下学期期中考试高一英语试题本试卷分第一卷（选择题）和第二卷（非选择题）两部分。

共150分。

考试结束后，将本试卷和答题卡一并收回。

第一卷注意事项：1. 答题前，考生先将自己的姓名，准考证号码填写清楚，将条形码准确粘贴在条形码区域内。

2. 选择题必须使用2B铅笔填涂；非选择题必须使用0.5毫米黑色字迹的签字笔书写，字体工整，笔迹清楚。

3. 请按照题号顺序在各题目的答题区域内作答，超出答题区域书写答案无效；在草稿纸、试题卷上答题无效。

4. 保持卡面清洁，不要折叠、不要弄破、弄皱，不准使用涂改液、修正带、刮纸刀。

第一部分听力（不计入总分）第一节听下面5段对话。

每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。

听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。

每段对话仅读一遍。

1．What will the woman do this afternoon?A．Do some exercise.B．Go shopping. C．Wash her clothes.2．Why does the woman call the man?A．To cancel a flight. B．To make an apology. C．To put off a meeting.3．How much more does David need for the car?A．$ 5,000. B．$20,000. C．$25,000.4．What is Jane doing?A．Planning a tour. B．Calling her father. C．Asking for leave.5．How does the man feel?A．Tied. B．Dizzy. C．Thirsty.第二节听下面5段对话或独白。

每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项。

眉山一中办学共同体2020届高一下4月月考数学试题第Ⅰ卷（选择题共60分）一、选择题本大题共12小题，每小题5分，共60分，在每小题给出的四个选项中，只有一个是符合题目要求的。

1. 下列命题中正确的是（）A. B. C. D.【答案】B【解析】分析：根据想的线性运算即可得.点睛：考查向量线性运算和定义，属于基础题.2. 若向量，当与共线且方向相同时，等于( )A. B. C. D.【答案】C【解析】分析：由向量的共线结论即可得，又因为共线且方向相同，故两向量之间应存在一个正的倍数关系.详解：由题可得：因为与共线，所以，又因为方向相同，所以x=2选C.点睛：考查向量的共线定理和方向相同的关系，属于基础题.3. 在△ABC中，角A，B，C的对边分别是a，b，c，若A∶B∶C＝1∶2∶3，则a∶b∶c等于( )A. 1∶2∶3B. 2∶3∶4C. 3∶4∶5D. 1∶∶2【答案】D【解析】分析：由三角形内角和为180°可得A,B,C的值，然后根据正弦定理可得结论.详解：由题可得：A=30°，B=60°，C=90°，由正弦定理：,故选D.点睛：考查三角形的内角和，正弦定理的边角互化关系，属于基础题.4. 已知a、b、c为△ABC的三边长，若满足(a＋b－c)(a＋b＋c)＝ab，则∠C的大小为( )A. 60°B. 90°C. 120°D. 150°【答案】C【解析】试题分析：由（a+b﹣c）（a+b+c）=ab可得c2=a2+b2+ab，由余弦定理可得，cosC==可求C的值．解：∵（a+b﹣c）（a+b+c）=ab，∴c2=a2+b2+ab，由余弦定理可得，cosC====，∵0°＜C＜180°，∴C=120°，故选：C．考点：余弦定理．5. 下列命题正确的是（）A. B. 若，则C. D. 若或【答案】C【解析】分析：根据向量的运算法则和规律即可得出结论.详解：A.因为向量之积的计算涉及到向量的夹角，故错误，B.向量的运算不满足除法法则故错误，D.两向量之积为0，也可以为当两向量垂直时，故错误，所以选C.点睛：考查向量的运算规律和定义，对定义的理解和运算性质的清晰为解题关键，属于易错题.6. 已知|a|＝2，向量a在向量b上的投影为，则a与b的夹角为( )A. B. C. D.【答案】B【解析】作，以OA，OB为邻边作平行四边形OACB，则，∠AOC为向量与的夹角．因为，所以△OAB是等边三角形，平行四边形OACB是菱形，所以．选A．7. 已知向量,则ABC=A. 300B. 450C. 600D. 1200【答案】A【解析】分析：根据向量的夹角公式即可得出.详解：由题可得：故选A.点睛：考查向量的数量积的运算和向量的坐标运算，属于基础题.8. 已知是两个非零向量，且，则的夹角为( )A. 300B. 600C. 900D. 1200【答案】C【解析】分析：本题主要考查两个向量的加减法的法则，以及其几何意义，由条件利用数形结合可得的夹角．详解：如图所示：设以OA、OB为邻边，作平行四边形OACB，则的夹角为对角线的夹角，由，可得△OAB 为等边三角形，故平行四边形OACB为菱形，所以的夹角90°，故选C.点睛：本题主要考查两个向量的加减法的法则，以及其几何意义，属于基础题．9. 在△ABC中,N是AC边上一点,且=,P是线段BN上的一点,若=m+,则实数m的值为( )A. B. C. 1 D. 3【答案】B【解析】试题分析：,,,则;因为＝m＋，所以.，即;是BN上的一点，,，即.考点：平面向量的线性运算.10. 点在所在平面内，且分别满足，,,则点依次是的（）A. 重心，外心，内心B. 重心，外心，垂心C. 外心，重心，垂心D. 外心，垂心，内心【答案】B【解析】分析：由三角形五心的性质即可判断出答案．详解：因为,取AB的中点D，,∴C，O，D三点共线，即O为△ABC的中线CD上的点，且0C=20D．∴O为△ABC的重心．因为，所以PA=PB=PC,故P为外心.因为，同理可得：MA⊥BC,MC⊥AB，所以为垂心.故选B.点睛：本题考查了三角形五心的性质，平面向量的线性运算的几何意义，属于中档题．11. （2011年四川高考）在中,.则的取值范围是A. (0，]B. [ ，)C. (0，]D. [ ，)【答案】C【解析】试题分析：由于，根据正弦定理可知，故．又，则的范围为.故本题正确答案为C.考点：三角形中正余弦定理的运用.12. 已知是边长为2的等边三角形，P为平面ABC内一点，则的最小是（）A. B. C. D.【答案】B【解析】以BC中点为坐标原点，建立如图所示的坐标系，则A（0，2），B（﹣2，0），C（2，0），设P（x，y），则=（﹣x，2﹣y），=（﹣2﹣x，﹣y），=（2﹣x，﹣y），所以•（+）=﹣x•（﹣2x）+（2﹣y）•（﹣2y）=2x2﹣4y+2y2=2[x2+2（y﹣）2﹣3]；所以当x=0，y=时，•（+）取得最小值为2×（﹣3）=﹣6．故选：D．第Ⅱ卷（非选择题共90分）二、填空题：本大题共4小题，每小题5分，共20分。