2018年全国高考2卷试题

2018年全国高考2卷试题
2018年全国高考2卷试题

2018年全国普通高等学校统一考试

英语试题

(本试卷共12页。时间:120分钟总分:150分)

第一部分听力(共两节,满分30分)

做题时,先将答案标在试卷上。录音内容结束后,你将有两分钟的时间将试卷上的答案转涂到答题卡上。

例:How much is the shirt?

A. £ 19. 15

B. £ 9. 18

C. £ 9. 15

答案是C。

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 does John find difficult in learning German?

A. Pronunciation.

B. V ocabulary.

C. Grammar.

2.What is the probable relationship between the speakers?

A. Colleagues.

B. Brother and sister.

C. Teacher and student.

3.Where does the conversation probably take place?

A. In a bank.

B. At a ticket office.

C. On a train.

4.What are the speakers talking about?

A. A restaurant.

B. A street.

C. A dish.

5.What does the woman think of her interview?

A. It was tough.

B. It was interesting.

C. It was successful.

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,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。

听第6段材料,回答第6、7题。

6.When will Judy go to a party?

A. On Monday.

B. On Tuesday.

C. On Wednesday.

7.What will Max do next?

A. Fly a kite.

B. Read a magazine.

C. Do his homework.

听第7段材料,回答第8、9题。

8.What does the man suggest doing at first?

A. Going to a concert.

B. Watching a movie.

C. Playing a computer game.

9.What do the speakers decide to do?

A. Visit Mike.

B. Go boating.

C. Take a walk.

听第8段材料,回答第10至12题。

10. Which color do cats see better than humans?

A. Red.

B. Green.

C. Blue.

11.Why do cats bring dead birds home?

A. To eat them in a safe place.

B. To show off their hunting skills.

C. To make their owners happy.

12. How does the man sound at the end of the conversation?

A. Grateful.

B. Humorous.

C. Curious.

听第9段材料,回答第13至16题。

13.Who is Macy?

A. Ed’s mother.

B. Ed’s teacher.

C. Ed’s friend.

14.How does Ed usually go to kindergarten?

A. By car.

B. On foot.

C. By bus.

15. What does Ed enjoy doing at the kindergarten?

A. Telling stories.

B. Sing songs.

C. Playing with others.

16.What do the teachers say about Ed?

A. He’s clever.

B. He’s quiet.

C. He’s brave.

听第10段材料,回答第17至20题。

17.At what age did Emily start learning ballet?

A. Five.

B. Six.

C. Nine.

18. Why did Emily move to Toronto?

A. To work for a dance school.

B. To perform at a dance theater.

C. To learn contemporary dance.

19.Why did Emily quit dancing?

A. She was too old to dance.

B. She failed to get a scholarship.

C. She lost interest in it.

20.How does Emily feel about stopping training?

A. She’s pleased.

B. She’s regretful.

C. She’s upset.

第二部阅读理解(共两节,满分40分)

第一节(共15题;每小题2分,满分30分)

阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。

A

Summer Activities

Students should read the list with their parents/carers, and select two activities they would like to do. Forms will be available in school and online for them to indicate their choices and return to school. Before choices are finalised, parents/ carers will be asked to sign to confirm their children’s choices.

21. Which activity will you choose if you want to go camping?

A. OUT.

B. WBP.

C. CRF.

D.POT.

22. What will the students do on Tuesday with Mrs. Wilson?

A. Travel to London

B. see a parade and fireworks.

C. Tour central Paris.

D. Visit the WWI battlefields.

23. How long does Potty about Potter last?

A. Two days.

B. Four days

C. Five days

D. One week.

B

Many of us love July because it’s the month when nature’s berries and stone fruits are in abundance. These colorful and sweet jewels from British Columbia’s fields are little powerhouses of nutritional protection.

Of the common berries, strawberries are highest in vitamin C, although, because of their seeds, raspberries contain a little more protein(蛋白质), iron and zinc (not that fruits have much protein). Blueberries are particularly high in antioxidants (抗氧化物质). The yellow and orange stone fruits such as peaches are high in the carotenoids we turn into Vitamin A and which are antioxidants. As for cherries(樱桃), they are so delicious who care? However, they are rich in Vitamin C.

When combined with berries or slices of other fruits, frozen bananas make an excellent base for thick, cooling fruits shakes an d low fat “ice cream”. For this purpose, select ripe bananas for freezing as they are much sweeter. Remove the skin and place them in plastic bags or containers and freeze. If you like, a squeeze of fresh lemon juice on the bananas will prevent them turning brown. Frozen bananas will last several weeks, depending on their ripeness and the temperature of the freezer.

If you have a juicer, you can simply feed in frozen bananas and some berries or sliced fruit. Out comes a “Soft-serve” creamy dessert, to be ea ten right away. This makes a fun activity for a children’s party; they love feeding the fruit and frozen bananas into the top of the machine and watching the ice cream come out below.

24.What does the author seem to like about cherries?

A. They contain protein.

B. They are high in vitamin A.

C. They have a pleasant taste.

D. They are rich in antioxidants.

25.Why is fresh lemon juice used in freezing bananas?

A. To make them smell better.

B. To keep their colour.

C. To speed up their ripening.

D. To improve their nutrition.

24.What is “a juicer” in the last paragraph?

A. A dessert.

B. A drink.

C. A container.

D. A machine.

25.From which is the text probably taken?

A. A biology textbook.

B. A health magazine.

C. A research paper. C. A travel brochure.

C

Teens and younger children are reading a lot less for fun, according to a Common Sense Media report published Monday.

While the decline over the past decade is steep for teen readers, some data in the report sho ws that reading remains a big part of many children’s lives, and indicates how parents might help encourage more reading.

According to the report’s key findings, “the proportion (比例) who say they ‘hardly ever’ read for fun has gone from 8 percent of 13-year-olds and 9 percent of 17-year-olds in 1984 to 22 percent and 27 percent respectively today.”

The report data shows that pleasure reading levels for younger children, ages 2-8, remain largely the same. But the amount of time spent in reading each session had declined, from closer to an hour or more to closer to a half hour per session.

When it comes to technology and reading, the report does little to counsel (建议) parents looking for data about the effect of e-readers and tablets on reading. It does point out that many parents still limit electronic reading mainly due to concerns about increased screen time.

The most hopeful data shared in the report shows clear evidence of parents serving as examples and important guides for their kids when it comes to reading. Data shows that kids and teens who do read frequently, compared to infrequent readers, have more books in the home, more books purchased for them, parents who read more often, and parents who set aside time for them to read.

At the end of school approaches, and school vacation reading lists loom(逼近) ahead, parents might take the chance to step in and make their own summer reading list and plan a family trip to the library or bookstore.

28.What is the Common Sense Media report probably about?

A.Children’s reading habits.

B.Quality of children’s books.

C.Ch ildren’s after-class activities.

D.Parent-child relationships.

29.Where can you find the data that best supports “children are reading a lot less for fun”?

A.In paragraph 2

B. In paragraph 3

C. In paragraph 4

D. In paragraph 5

30.Why do many parents limit electronic reading?

A.E-books are of poor quality.

B.It could be a waste of time.

C.It may harm children’s health.

D.E-readers are expensive.

31.How should parents encourage their children to read more?

A.Act as role models for them.

B. Ask them to write book reports.

C. Set up reading groups for them.

D. Talk with their reading class teachers.

D

We’ve been there: in a lift, in line at the bank or on an airplane, surrounded by people who are, like us, deeply focused on their smartphones or, worse, struggling with the uncomfortable silence.

What’s the problem? It is possible that we all have compromised conversational intelligence. It’s more likely that none of us start a conversation because it’s awkward and challenging, or we think it’s annoying and unnecessary. But the next time you find yourself among strangers, consider that small talk is worth the trouble. Experts say it’s an invaluable social practice that results in big benefits.

Dismissing small talk as unimportant is easy, but we can’t forget that deep relationships wouldn’t even exist if it weren’t for casual conversation. Small talk is the grease (润滑剂) for social communication, says Bernardo Carducci, director of the Shyness Research Institute at Indian University Southeast. “Almost every great love story and each big business deal begins with small talk,” he explains. “The key to successful small t alk is learning how to connect with others, not just communicate with them.”

In a 2014 study, Elizabeth Dunn, associate professor of psychology at UBC, invited people on their way into a coffee shop. One group was asked to seek out an interaction (互动) with its waiter; the other, to speak only when necessary. The results showed that those who chatted with their server reported significantly higher positive feelings and a better coffee shop experience. “It’s not that talking to the waiter is better than talking to your husband,” say Dunn. “But interactions with peripheral (边缘的) members of our social network matter for our well-being also.”

Dunn believes that people who research out to strangers feel a significantly greater sense of belonging, a bond with others. Carducci believes developing such a sense of belonging starts w ith small talk. “Small talk is the basis of good manners,” he says.

32. What phenomenon is described in the first paragraph?

A. Addiction to smartphones.

B. Inappropriate behaviours in public places.

C. Absence of communication between strangers.

D. Impatience with slow service.

33. What is important for successful small talk according to Carducci?

A. Showing good manners.

B. Relating to other people.

C. Focusing on a topic.

D. Making business deals.

34. What does the coffee-shop study suggest about small talk?

A. It improves family relationships.

B. It raises people’s confidence.

C. It matters as much as a formal talk.

D. It makes people feel good.

35. What is the best title for the text?

A. Conversation Counts

B. Ways of Making Small Talk

C. Benefits of Small Talk

D. Uncomfortable Silence

第二节(共5小题;每小题2分,共10分)

根据短文内容,从短文后的七个选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

If you are already making the time to exercise, it is good indeed! With such busy lives, it can be hard to try and find the time to work out. 36 Working out in the morning provides additional benefits beyond being physically fit.

●Your productivity is improved. Exercising makes you more awake and ready

to handle whatever is ahead of you for the day. 37

●Your metabolism (新陈代谢) gets a head start. 38 If you work out in

the mornings, then you will be getting the calorie (卡路里) burning benefits for the whole day, not in your sleep.

●39 Studies found that people who woke up early for exercise slept better than those who exercised in the evening. Exercise energizes you, so it is more difficult to

relax and have a peaceful sleep when you are very excited.

40 If you work out bright and early in the morning, you will be more likely to stick to healthy food choices throughout the day. Who would want to ruin their good workout by eating junk food? You will want to continue to focus on positive choices.

There are a lot of benefits to working out, especially in the mornings. Set your alarm clock an hour early and push yourself to work out! You will feel energized all day long.

A.You will stick to your diet.

B.Your quality of sleep improves.

C.You prefer healthy food to fast food.

D.There is no reason you should exercise in the morning.

E.You can keep you head clear for 4-10 hours after exercise.

F.After you exercise, you continue to burn calories throughout the day.

G.If you are planning to do exercise regularly, or you’re doing it now, then listen up.

第三部分英语知识运用(共两节,满分45分)

第一节完形填空(共20小题;每小题1.5分,满分30分)

阅读下面短文,从短文后各题所给的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项。

Two weeks earlier, my son, Ben, had got in touch. He’d moved to England with his mum when he was three and it had been 13 years since I’d 41 seen him. So imagine my 42 when he emailed me saying he wanted to come to visit me.

I was 43 ! I arrived early at Byron Bay where we were supposed to 44 . The bay was 45 in sunshine, and there was a group of kayakers around 150m off the shore. Getting a little 46 , I realized one kayak (皮筏艇) was in 47 . “Something’s not 48 !” I took off my T-shirt and 49 into the water. I saw there were two instructors on board and a man lying across the middle. He was 50 violently. Linking arms with one of the instructors, I helped 51 the young man out of water. He was unconscious and as I looked at his face, something 52 to me. Those brown eyes were very 53 “What’s his name?”I asked the instructor. “Ben,” he replied, and immediately I 54 . That stranger was my son.

The instructors called for an ambulance. 55 , after a brief stay in hospital, Ben was well enough to be allowed to 56 and later the family met up for dinner. We chatted about everything and then Ben 57 to me. “I just want to say thank you,” he

said. “You 58 my life!”

I still can’t believe what a 59 it was. I’m just so glad I was there 60 to help my son.

41. A. also B. often C. even D. last

42. A. delight B. relief C. anger D. worry

43. A. scared B. shocked C. thrilled D. ashamed

44. A. talk B. stay C. meet D. settle

45. A. bathed B. clean C. deep D. formed

46. A. faster B. closer C. heavier D. wiser

47. A. trouble B. advance C. question D. battle

48. A. real B. right C. fair D. fit

49. A. stared B. sank C. dived D. fell

50. A. arguing B. fighting C. shouting D. shaking

51. A. lead B. persuade C. carry D. keep

52. A. happened B. occurred C. applied D. appealed

53. A. sharp B. pleasant C. attractive D. familiar

54.A. agreed B. hesitated C. doubted D. knew

55. A. Fortunately B. Frankly C. Sadly D. Suddenly

56. A. return B. relax C. speak D. leave

57. A. joked B. returned C. listened D. pointed

58. A. created B. honored C. saved D. guided

59. A. coincidence B. change C. pity D. pain

60. A. on board B. in time C. for sure D. on purpose

第二节(共10小题;每小题1.5分,满分15分)

阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

Diets have changed in China-and so too has its top crop. Since 2011, the country 61 (grow) more corn than rice. Corn production has jumped nearly 125 percent over 62 past 25 years, while rice has increased only 7 percent.

A taste for meat is 63 (actual) behind the change: An important part of its corn is used to feed chickens, pigs, and cattle. Another reason for corn’s rise: The government

encourages farmers to grow corn instead of rice 64 (improve) water quality. Corn uses less water 65 rice and creates less fertilizer (化肥) runoff. This switch has decreased 66 (pollute) in the country’s major lakes and reservoirs and made drinking water safer for people.

According to the World Bank, China accounts for about 30 percent of total 67 (globe) fertilizer consumption. The Chinese Ministry of Agriculture finds that between 2005-when the government 68 (start) a soil-testing program 69 gives specific fertilizer recommendations to farmers - and 2011, fertilizer use dropped by 7.7 million tons. That prevented the emission(排放)of 51.8 million tons of carbon dioxide. China’s approach to protecting its environment while 70 (feed) its citizens “offers useful lessons for agriculture and food policymakers worldwide,” says the bank’s Juergen Voegele.

第四部分写作(共两节,满分35分)

第一节短文改错(共10小题;每小题1分,满分10分)

请改正下面短文中的错误。文中共有10处语言错误,每句中最多有三处。每处错误仅涉及一个单词的增加、删除或修改。

增加:在缺词处加一个漏字符号(∧),并在其下面写出该加的词;

删除:把多余的词用斜线(\)划掉;

修改:在错的词下画一横线,并在该词下面写出修改后的词。

注意:1.每处错误及其修改均仅限一词;

2.只允许修改10处,多者(从第11处起)不计分。

When I was little, Friday’s night was our family game night. After supper, we would play card games of all sort in the sitting room. As the kid, I loved to watch cartoons, but no matter how many times I asked to watching them, my parents would not to let me. They would say to us that playing card games would help my brain. Still I unwilling to play the games for them sometimes. I didn’t realize how right my parents are until I entered high school. The games my parents taught me where I was a child turned out to be very useful later in my life.

第二节书面表达(满分25分)

你受学生会委托为校宣传栏“英语天地”写一则通知,请大家观看一部英文短片Growing Together,内容包括:

1.短片内容:学校的发展;

2.放映时间、地点;

3.欢迎对短片提出意见。

注意:

1.词数100左右;

2.可以适当增加细节,以使行文连贯。

Notice

There is a short English film this weekend.

_________________________________________________________________________ _________________________________________________________________________

Student Union

2018年高考理科数学试题及答案-全国卷2

2018年普通高等学校招生全国统一考试(全国卷2) 理科数学 一、选择题:本题共12小题,每小题5分,共60分,在每小题给出的四个选项中,只有一项是符合题目要求的。1. 12i 12i + = - A. 43 i 55 --B. 43 i 55 -+C. 34 i 55 --D. 34 i 55 -+ 2.已知集合() {} 223 A x y x y x y =+∈∈ Z Z ,≤,,,则A中元素的个数为 A.9 B.8 C.5 D.4 3.函数()2 e e x x f x x - - =的图像大致为 4.已知向量a,b满足||1 = a,1 ?=- a b,则(2) ?-= a a b A.4 B.3 C.2 D.0 5.双曲线 22 22 1(0,0) x y a b a b -=>>3 A.2 y x =B.3 y x =C. 2 y=D. 3 y= 6.在ABC △中, 5 cos 2 C 1 BC=,5 AC=,则AB= A.2B30C29 D.25 7.为计算 11111 1 23499100 S=-+-++- …,设计了右侧的程序框图,则在空白 框中应填入 A.1 i i=+ B.2 i i=+ C.3 i i=+ D.4 i i=+ 8.我国数学家陈景润在哥德巴赫猜想的研究中取得了世界领先的成果.哥德巴赫猜想是“每个大于2的偶数可以表示为两个素数的和”,如30723 =+.在不超过30的素数中,随机选取两个不同的数,其和等于30的概率是 开始 0,0 N T == S N T =- S 输出 1 i= 100 i< 1 N N i =+ 1 1 T T i =+ + 结束 是否

2018年高考全国二卷全国卷理综试题及参考答案

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二、选择题:本题共8小题,每小题6分,共48分。在每小题给出的四个选项中,第14~18题只有一项符合题目要求, 第19~21题有多项符合题目要求。全部选对的得6分,选对但不全的得3分,有选错的得0分。 14.如图,某同学用绳子拉动木箱,使它从静止开始沿粗糙水平路面运动至具有某一速度,木箱获得的动能一定 A .小于拉力所做的功 B .等于拉力所做的功 C .等于克服摩擦力所做的功 D .大于克服摩擦力所做的功 15.高空坠物极易对行人造成伤害。若一个50g 的鸡蛋从一居民楼的25层坠下,与地面的撞击时间约为2ms , A .16.2018年,假设 A .5?C .5?17.用波长为10-34 J·s, A .1?18.i 随时间t 19.t 2时 A B .t 1C D .乙车的加速度大小先减小后增大 20.如图,纸面内有两条互相垂直的长直绝缘导线L 1、L 2,L 1中的电流方向向左,L 2中的电流方向向上;L 1的正上方有a 、 b 两点,它们相对于L 2对称。整个系统处于匀强外磁场中,外磁场的磁感应强度大小为B 0,方向垂直于纸面向外。 已知a 、b 两点的磁感应强度大小分别为 013B 和01 2B ,方向也垂直于纸面向外。则 A .流经L 1的电流在b 点产生的磁感应强度大小为07 12B B .流经L 1的电流在a 点产生的磁感应强度大小为0112B C .流经L 2的电流在b 点产生的磁感应强度大小为0112B D .流经L 2的电流在a 点产生的磁感应强度大小为0712 B

2018年高考化学全国II卷解析版

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2018年高考理科数学全国三卷试题及答案解析

2018年高考理科全国三卷 一.选择题 1、已知集合,则( ) A. B. C. D. 2、( ) A. B. C. D. 3、中国古建筑借助榫卯将木构件连接起来,构建的突出部分叫榫头,凹进部分叫卯眼,图中木构件右边的小长方体是榫头,若如图摆放的木构件与某一带卯眼的木构件咬合成长方体,则咬合时带卯眼的木构件的俯视图可以是( ) A. B. C. D. 4、若,则( ) A. B. C. D. 5、的展开方式中的系数为( ) A.10 B.20 C.40 D.80 6、直线分别与轴,轴交于两点,点在圆上,则 面积的取值范围是( ) A. B. C. D. 7、函数的图像大致为( )

A. B. C. D. 8、某群体中的每位成员使用移动支付的概率为,各成员的支付方式相互独立,设为该群体的为成员中使用移动支付的人数,,则( ) A.0.7 B.0.6 C.0.4 D.0.3 9、的内角的对边分别为,若的面积为则=( ) A. B. C. D. 10、设是同一个半径为的球的球面上四点,为等边三角形且其面积为,则三棱锥体积的最大值为( ) A. B. C. D. 11、设是双曲线的左,右焦点,是坐标原点,过作的一条逐渐近线的垂线,垂足为,若,则的离心率为( ) A. B.2 C. D. 12、设则( ) A. B. C. D. 13、已知向量,若,则 14、曲线在点处的切线的斜率为,则 15、函数在的零点个数为 16、已知点和抛物线,过的焦点且斜率为的直线与交于两点。若 ,则 三.解答题

17、等比数列中, 1.求的通项公式; 2.记为的前项和,若,求 18、某工厂为提高生产效率,开展技术创新活动,提出了完成某项生产任务的两种新的生产方式,为比较两种生产方式的效率,选取名工人,将他们随机分成两组,每组人,第一组工人用第一种生产方式,第二组工人用第二种生产方式,根据工人完成生产任务的工作时间(单位:)绘制了如下茎叶图: 1.根据茎叶图判断哪种生产方式的效率更高?并说明理由; 2.求名工人完成生产任务所需时间的中位数,并将完成生产任务所需时间超过和不超过的工人数填入下面的列联表: 超过不超过 第一种生产方 式 第二种生产方 式 3.根据中的列联表,能否有的把握认为两种生产方式的效率有差异? 附: 19、如图,边长为的正方形所在的平面与半圆弧所在的平面垂直,是上异于的点

2018年高考全国2卷语文真题及参考答案(word版)

绝密★启用前 2018年普通高等学校招生全国统一考试 (全国卷Ⅱ)

语文试题 注意事项: 1.答卷前,考生务必将自己的姓名、准考证号填写在答题卡上。 2.回答选择题时,选出每小题答案后,用铅笔把答题卡上对应题目的答案标号涂黑。 如需改动,用橡皮擦干净后,再选涂其他答案标号。回答非选择题时,将答案写在答题卡上,写在本试卷上无效。 3.考试结束后,将本试卷和答题卡一并交回。 一、现代文阅读(36分) (一)论述类文本阅读(本题共3小题,9分) 阅读下面的文字,完成1~3题。 所谓“被遗忘权”,即数据主体有权要求数据控制者永久删除有关数据主体的个人数据,有权被互联网遗忘,除非数据的保留有合法的理由。在大数据时代,数字化、廉价的 存储器,易于提取,全球性覆盖作为数字化记忆发展的四大驱动力,改变了记忆的经济学,使得海量的数字化记忆不仅唾手可得,甚至比选择性删除所耗费的成本更低。记忆和遗忘 的平衡反转,往事正像刺青一样刻在我们的数字肌肤上;遗忘变得困难,而记忆却成了常态。“被遗忘权”的出现,意在改变数据主体难以“被遗忘”的格局,赋予数据主体对信 息进行自决控制的权利,并且有着更深的调节,修复大数据时代数字化记忆伦理的意义。 首先,“被遗忘权”不是消极地预御自己的隐私不受侵犯,而是主体能动地控制个人 信息,并界定个人隐私的边界,进一步说,是主体争取主动建构个人数字化记忆与遗忘的 权利,与纯粹的“隐私权”不同,“被遗忘权”更是一项主动性的权利,其权利主体可自 主决定是否行使该项权利对网络上已经被公开的有关个人信息进行删除。是数据主体对自 己的个人信息所享有的排除他人非法利用的权利。 其次,在数据快速流转且难以被遗忘的大数据时代,“被遗忘权”对调和人类记忆与 遗忘的平衡具有重要的意义。如果在大数据时代不能“被遗忘”,那意味着人们容易被囚 禁在数字化记忆的监狱之中,不论是个人的遗忘还是社会的遗忘,在某种程度上都是一种 个人及社会修复和更新的机制,让我们能够从过去经验中吸取教训,面对现实,想象未来,而不仅仅被过去的记忆所束缚。 最后,大数据技术加速了人的主体身份的“被数据化”,人成为数据的表征,个人生 活的方方面面都在以数据的形式被记忆。大数据所建构的主体身份会导致一种危险,即 “我是”与“我喜欢”变成了“你是”与“你将会喜欢”;大数据的力量可以利用信息去

2018年高考数学全国卷III

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8.某群体中的每位成员使用移动支付的概率都为P ,各成员的支付方式相互独立,设X 为该群体的10位成员中使用移动支付的人数,4.2=DX ,()()64=<=X P X P ,则=P ( ) .A 0.7 .B 0.6 .C 0.4 .D 0.3 9.ABC ?的内角C B A 、、的对边分别c b a 、、,若ABC ?的面积为222 4 a b c +-,则=C ( ) . A 2π . B 3π . C 4π . D 6 π 10.设D C B A 、、、是同一个半径为4的球的球面上四点,△ABC 为等边三角形且其面积为,则三棱锥ABC D -积的最大值为 ( ) .A .B .C .D 11.设21F F 、是双曲线C : 22 221x y a b -=(0,0>>b a )的左、右焦点,O 是坐标原点,过2F 作C 的一 条渐近线的垂线,垂足为P ,若1PF =,则C 的离心率为 ( ) .A .B 2 .C .D 12.设3.0log 2.0=a ,3.0log 2=b ,则 ( ) .A 0a b ab +<< .B 0a b a b <+< .C 0a b a b +<< .D 0ab a b <<+

2018年高考英语全国2卷真题及答案(word版)

绝密★启用前 2018年全国普通高等学校统一考试(全国2卷)

英语试题 第二部阅读理解(共两节,满分40分) 第一节(共15题;每小题2分,满分30分) 阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。 A Summer Activities Students should read the list with their parents/carers, and select two activities they would like to do. Forms will be available in school and online for them to indicate their choices and return to school. Before choices are finalised, parents/ carers will be asked to sign to confirm their children’s choices.

21. Which activity will you choose if you want to go camping? A. OUT. B. WBP. C. CRF. D.POT. 22. What will the students do on Tuesday with Mrs. Wilson? A. Travel to London B. see a parade and fireworks. C. Tour central Paris. D. Visit the WWI battlefields. 23. How long does Potty about Potter last? A. Two days. B. Four days C. Five days D. One week. B Many of us love July because it’s the month when nature’s berries and stone fruits are in abundance. These colorful and sweet jewels from British Columbia’s fields are little powerhouses of nutritional protection. Of the common berries, strawberries are highest in vitamin C, although, because of their seeds, raspberries contain a little more protein(蛋白质), iron and zinc (not that fruits have much protein). Blueberries are particularly high in antioxidants (抗氧化物质). The yellow and orange stone fruits such as peaches are high in the carotenoids we turn into Vitamin A and which are antioxidants. As for cherries(樱桃), they are so delicious who care? However, they are rich in Vitamin C. When combined with berries or slices of other fruits, frozen bananas make an excellent base for thick, cooling fruits shakes and low fat “ice cream”. For this purpose, select ripe bananas for freezing as they are much sweeter. Remove the skin and place them in plastic bags or containers and freeze. If you like, a squeeze of fresh lemon juice on the bananas will prevent them turning brown. Frozen bananas will last several weeks, depending on their ripeness and the temperature of the freezer.

2018年高考化学全国卷2

2018年化学高考全国二卷 单选题 1.化学与生活密切相关。下列说法错误的是()。 A. 碳酸钠可用于去除餐具的油污 B. 漂白粉可用于生活用水的消毒 C. 氢氧化铝可用于中和过多胃酸 D. 碳酸钡可用于胃肠X射线造影检查 2.研究表明,氮氧化物和二氧化硫在形成雾霾时与大气中的氨有关(如图所示)。下列叙述错误的是()。 A.雾和霾的分散剂相同 B.雾霾中含有硝酸铵和硫酸铵 C.是形成无机颗粒物的催化剂 D.雾霾的形成与过度施用氮肥有关 3.实验室中用如图所示的装置进行甲烷与氯气在光照下反应的实验。 光照下反应一段时间后,下列装置示意图中能正确反映实验现象的是()。 A. A B. B C. C D. D 4.和为原子序数依次增大的四种短周期元素。与可生成一种红棕色有刺激性气味的气体;的 周期数是族序数的3倍;原子最外层的电子数与的电子总数相同。下列叙述正确的是()。 A.X与其他三种元素均可形成两种或两种以上的二元化合物 B.Y与其他三种元素分别形成的化合物中只含有离子键 C.四种元素的简单离子具有相同的电子层结构 D.W的氧化物对应的水化物均为强酸

5.代表阿伏加德罗常数的值。下列说法正确的是()。

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2018年数学高考全国卷3答案

2018年数学高考全国卷3答案

参考答案: 13. 14. 15. 16.2 17.(12分) 解:(1)设的公比为,由题设得. 由已知得,解得(舍去),或. 故或. (2)若,则.由得,此方 程没有正整数解. 若,则.由得,解得. 综上,. 18.(12分) 解:(1)第二种生产方式的效率更高. 理由如下: (i )由茎叶图可知:用第一种生产方式的工人中,有75%的工人完成生产任务所需时间至少80分钟,用第二种生产方式的工人中,有75%的工人完成生产任务所需时间至多79分钟.因此第二种生产方式的效率更高. 12 3-3{}n a q 1 n n a q -=4 2 4q q =0q =2q =-2q =1 (2)n n a -=-1 2n n a -=1 (2) n n a -=-1(2)3 n n S --= 63 m S =(2) 188 m -=-1 2n n a -=21 n n S =-63 m S =2 64 m =6m =6m =

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2018年全国高考理科数学2卷 - 精美解析版

2018年普通高等学校招生全国统一考试(新课标II卷) 理科数学 本试卷4页,23小题,满分150分.考试用时120分钟. 2018.6.29 一、选择题:本题共12小题,每小题5分,共60分.在每小题给出的四个选项中,只有一项是符合题目要求 的. 1.12i 12i () A. 43433434 i B.i C.i D.i 55555555 1.【解析】12i 12i234i34 i 12i12i12i555 ,故选D. 2.已知集合A {(x,y)|x2y23,x Z,y Z},则A中元素的个数为()A.9B.8C.5D.4 2.【解析】A {(1,1),(1,0),(1,1),(0,1),(0,0),(0,1),(1,1),(1,0),(1,1)},元素的个数为9,故选A. 3.函数f(x)e x e x x2 的图像大致为() y y A.1 O1x B.1 O1x y y C.1 O1x D.1 O1x 3.【解析】f(x)e x e x2 x f(x),即f(x)为奇函数,排除A;由 1 f(1) e 0 e 排除D;由 1/10

e 4e 411111 f (4)(e2)(e )(e ) e f(1) 1616e2e e e 排除C,故选B.4.已知向量a,b满足a 1,a b1,则a (2a b)()A.4B.3C.2D.0 4.【解析】a (2a b)2a a b213,故选B. 5.双曲线x2y2 1(a 0,b 0) a2b2 的离心率为3,则其渐近线方程为() A.y 2x B.y 3x C.y 23 x D.y 2 2 x 5.【解析】离心率 c c2a2b e 3 a a2a2 2 3,所以 b a 2,渐近线方程为y 2x,故选A. 6.在ABC中,cos C5 ,BC 1,AC 5,则AB ()25 42 A. cos C 2cos 6.【解析】2 30 B. B3 1 25 , C.29D.25 开始 由余弦定理得AB BC2AC22B C AC cos C 42, N 0,T 0故选A.i 1 7.为计算S 111111 23499100 ,设计了右侧的是i 100否 程序框图,则在空白框中应填入()A.i i 1N N 1 i S N T B.C.i i 2 i i 3 T T 1 i 1输出S D.i i 4 结束 7.【解析】依题意可知空白框中应填入i i 2.第1次循环:N 1,T 1 2 ,i 3;第2次循环: 11111111 N 1,T ,i 5; ;第50次循环:N 1 ,T ,i 101 32439924100 ,结 束循环得S 111111 23499100 ,所以选B. 8.我国数学家陈景润在哥德巴赫猜想的研究中取得了世界领先的成果.哥德巴赫猜想是“每个大于2 的偶数 可以表示为两个素数的和”,如的概率是()30723,在不超过30的素数中,随机选取两个不同的数,其和等于30 2

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