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It is generally believed that Watson and Crick’s discovery about DNA was ____ beginning of _____ enormous advances in _____ field of genetics.

A. the, the, the B. /, /, the C. the, /, the D. the, the, a

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根据短文内容,选出最佳选项,选项中有两项为多余选项。

American black bears appear in a variety of colors despite their name. In the eastern part of their range, most of these bears have shiny black fur, but in the west they grow brown, red, or even yellow coats. 1. Even in the same litter (一窝幼崽), both brown and black furred bears may be born.

Black bears are the smallest of all American bears, ranging in length from five to six feet, weighing from three hundred to five hundred pounds. 2.

3. However, if attacked, most can climb trees and cover ground at great speeds. When angry or frightened, they are formidable(可怕的) enemies.

Black bears feed on leaves, herbs, fruit, berries, insects, fish, and even larger animals. 4.Unlike squirrels, woodchucks, and many other woodland animals, bears do not actually hibernate(冬眠). Although the bear does not eat during the winter months, sustaining itself from body fat, its temperature remains almost normal, and it breathes regularly four or five times per minute.

5. They prefer to live in caves. Baby black bears are born in January or February after a gestation(怀孕) period of six to nine months, and they stay with their mother until they are fully grown or about one and a half years old. Black bears can live as long as thirty years in the wild, and even longer in some nature reserves.

A. To the north, the black bear is actually gray or white in color.

B. Black bears mate(交配) all year round.

C. One of the most interesting characteristics of bears, including the black bear, is their winter sleep.

D. Like all bears, the black bear is timid, clumsy, and rarely dangerous.

E. Bears often eat a lot of food before they hibernate in their caves.

F. Most black bears live alone, except during mating season.

G. Their eyes and ears are small and their eyesight and hearing are not as good as their sense of smell.

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In 1826, a French man named Niepce needed pictures for his business. But he was not a good artist. He invented a very simple camera. He put it in a window of his house and took a picture of his garden. That was the first photo.

The next important date in the history of photography was in 1837. That year, Daguerre, another Frenchman, took a picture of his reading room. He used a new kind of camera in a different way. In his picture you could see everything very clearly, even the smallest thing. This kind of photo was called a Daguerreotype.

Soon, other people began to use Daguerre's way. Travelers brought back wonderful photos from all around the world. People took pictures of famous buildings, cities and mountains.

In about 1840, photography was developed. Then photographers could take pictures of people and moving things. That was not simple. The photographers had to carry a lot of films and other machines. But this did not stop them, for example, some in the United States worked so hard.

Mathew Brady was a famous American photographer. He took many pictures of great people. The pictures were unusual because they were very lifelike.

Photography also became one kind of art by the end of the 19th century. Some photos were not just copies of the real world. They showed our feelings, like other kinds of art.

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A. business B. house

C. garden D. window

2.The Daguerreotype was _______.

A. a Frenchman B. a kind of picture

C. a kind of camera D. a photographer

3.This passage tells us_______.

A. how photography was developed

B. how to show you ideas and feelings in pictures

C. how to take pictures in the world

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The small number of newborn babies, which has been caused by high prices and the changing social situation of women, is one of the most serious problems in Asia. When people talk about it, you can hear a word invented in Japan, “DINKS”, which means Double Income No Kids.

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In a word, Asian governments must take steps to improve the present situation as soon as possible.

1. What is the main problem being discussed in the passage?

A. The small number of newborn babies.

B. The changing social situation of women.

C. The high prices of houses and education.

D. The necessary steps of Asian government.

2.According to the passage, which of the following is true?

A. It is easy for a couple to afford a child in Asia.

B. The prices of houses in Asia are quite low now.

C. Fewer and fewer married women want to have a job.

D. The word “DINKS” appeared in an Asian country.

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A. $5,000. B. $5,900.

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To prevent the deserts coming near, China has planted billions of trees---to replace destroyed forests and as barriers against the sand. This isn’t a cure, though, say experts, as thirsty trees can make the problem worse by taking in groundwater.

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A. it can make groundwater become less

B. it can prevent the sand moving freely

C. it can stop crops growing well

D. it can get the soil to become poor

2.Why did Mr. Lu NOT accept the idea of relocation?

A. Because the plan of relocation will cost him much money.

B. Because his family had trouble moving away.

C. Because he was reluctant to give up his land.

D. Because he would rather stay than fight against the deserts.

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B. People have no means to fight against the land becoming desert.

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D. Planting trees cannot solve the problem of desertification of farmland.

4.What advice is given by experts to save water?

A. To plant more trees.

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假设你是高三学生刘珊,你校正在组织美国哥伦比亚大学(Columbia University)招生活动,请你根据以下要点提示给你在美国的笔友Russ写一封信。

要点:

1. 通过校内选拔考试 (selective test) 的同学将参加该著名大学于一月份组织的英语笔试、口试和面试;

2. 你本人对此很感兴趣,正在积极备考;

3. 希望Russ给出一些有关英语学习的建议。

注意: 1.词数:100左右;

2.可适当增加细节,以使行文连贯;

3.开头与结尾已为你写好,请不要重新抄写。

Dear Russ,

How is everything going?

_________________________________________________________________

_________________________________________________________________

_________________________________________________________________

_________________________________________________________________

_________________________________________________________________

_________________________________________________________________

Yours,

Liu Shan

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完形填空

阅读下面短文,从短文后各题所给的A,B,C,D四个选项中选出最佳选项

Editors of newspapers and magazines often go too far in supplying readers with facts. Last year a reporter by a well-known magazine wrote an article on the president’s in a new African republic. When the article arrived, the editor read the first sentence and then refused to it. The article began like this, “Hundreds of steps lead to the high surrounding the president’s palace.” The editor sent the reporter a telegram directing him to find out the number of steps and height of the wall.

The reporter set out to get these important facts at once, but it him a long time to send them back. Meanwhile, the editor was growing , for the magazine would soon be . He sent the reporter two urgent(加急的) telegrams, but received reply. He sent another, yet the reporter again to reply. The editor unwillingly published the article it had been written. A week later, the editor at last the reporter, who told him in the letter that not only had he been arrested(逮捕)but he had been sent to . The poor man had been seized by the police while the 1804 steps leading to the 15-foot wall around the palace.

1.A. answered B. sent C. wanted D. taken

2.A. hometown B. office C. palace D. family

3.A. publish B. rewrite C. sign D. talk about

4.A. palace B. wall C. country D. prison

5.A. quickly B. later C. hurriedly D. immediately

6.A. exact B. large C. small D. unknown

7.A. took B. spent C. got D. found

8.A. glad B. fast C. anxious D. happy

9.A. sold B. sent C. shown D. printed

10.A. no B. much C. one D. any

11.A. managed B. failed C. had D. ought

12.A. until B. like C. when D. as

13.A. met with B. looked for C. came across D. heard from

14.A. a hotel B. prison C. the palace D. the office

15.A. counting B. going C. measuring D. drawing

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