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The stone was so heavy that it was difficult for the old mail to__________it．

The stone was so heavy that it was difficult for t

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第1题

We are profoundly ignorant about the origins of language and have to content ourselves wit

h more or less plausible speculations. We do not even know for certain when language arose, but it seems likely that it goes back to the earliest history of man, perhaps haft a million years ago. We have no direct evidence, but it seems probable that it took the earliest forms of human cooperation. In the Ice Ages of the Pleistocene(更新世) period, our earliest human ancestors established the Old Stone Age culture; they made stone tools and, later, tools of bone, ivory, and antler; they made fire and cooked their food; they hunted big game, often by methods that called for considerable cooperation and coordination. As their material culture gradually developed, they became artists and drew pebbles as well as wonderful paintings of animals on the walls of caves. It is difficult to believe that the makers of these Paleolithic(旧石器时代的) cultures lacked the power of speech. It is a long step, admittedly, from other earliest flint weapons to the splendid spear of the late Stone Age: the first crude flints date back perhaps to 500,000 B.C., while the finest achievements of Old Stone Age man are later than 100,000 B. C.; and in this period we can envisage a corresponding development of language, from the most primitive and limited language of the earliest human groups to a fully developed language in the flowering time of Old .Stone Age culture.

How did language arise in the first place？ There are many theories about this, based on various types of indirect evidence, such as the language of children, the language of primitive societies, the kinds of changes

that have taken place in language in the course of recorded history, the behavior. of higher animals like chimpanzees, and the behavior. of people suffering from speech defects. These types of evidence may provide us with pointers, but they all suffer from limitations.

When we consider the language of children, we haw to remember that their situations are quite different from those of our earliest human ancestors because the child, growing up in an environment where there is al- ready a fully developed language, is surrounded by adults who use that language and are teaching it to him. For example, it has been shown that the earliest words used by children are mainly the names of things and people ("doll," "spoon," "Mummy"), but this fact does not prove that the earliest words of primitive man were also the names of things and people. When the child learns the name of an object, he may then use it to express his wishes or demands.

"Doll!" often means,. "Give me my doll!" or "I've dropped my doll. Pick it up for me!" The child is us- ing language to get things done, and it is almost an accident of adult teaching that the words used to formulate the child's demands are mainly nouns instead of words like "Bring!" "Pick Up!" and so on.

Theories of the origin of language include all of the following EXCEPT______.

A．communication among primitive men

B．the need to communicate

C．the language of children

D．the first man's extensive vocabulary

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第2题

"A rolling stone gathers no moss （苔藓) ," but there is one living animal that does gather

"A rolling stone gathers no moss (苔藓) ," but there is one living animal that does gather moss, the three-toed sloth (树獭) of South America. This slowest-moving member of the animal kingdom is so inactive that moss actually gathers on its body and turns it green strange as it seems!

Most of the sloth's life is spent motionless, hanging upside down from a limb. And that is the way its hair grows. Long and coarse, the strands (串) from receptacles (花托) for the damp jungle algae (水藻) that turn the brown fur a mossy green. Actually this moss helps the animal survive because it serves as a per- fect camouflage against the leaf trees and hides the sloth from the jungle's swift-moving hunters. The sloth would have little chance of survival on the ground. With long, curved claws hooked over the limb of a leafy tree, it spends the long hot hours during the day drowsing and eating. Inch by inch, it strips the leafy limbs bare and crawls Slowly down the trunk to find a new dining spot, but only at night.

In addition to looking rather like a vegetable, the sloth is a strict vegetarian. Running out of its favorite leaf is about the only thing that will make a sloth move. Then its appetite may even force the animal into swimming a stream to reach a juicy succulent(多汁的值物). It will also force it into fighting to keep the tree all to itself. The sloth is lazy and prefers to be alone, but it will tolerate its own relatives!

A suitable title for this passage might be ______. ()

A．Wild Animals

B．Animal Kingdom

C．Moss Growth

D．The Lazy Animal

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第3题

卵巢低储备的预处理方案有哪些（）

A.GH（生长激素）

B.HEA（脱氢表雄酮）

C.TCM（中药）

D.OC（口服避孕药）

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第4题

以下关于DHEA-S错误的是（）

A.由卵巢生产的DHEA及DHEAS的量甚微

B.HEA是由肾上腺皮质，特别是皮质网状带生产的主要雄激素

C.HEA的半衰期较短，仅30分钟

D.HEAS半衰期较短，血液中含量较稳定

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第5题

Like with anything new, you shouldyour_________ physician before taking Colon Hea

Like with anything new, you should your_________ physician before taking Colon Health Cleansing or any other vitamin.

A． discuss

B． consult

C． request

D． tell

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第6题

The majority of our students ______the life of these native people. A. have never hea

The majority of our students ______the life of these native people.

A. have never heard of

B. has heard about

C. has never heard of

D. have never listened to

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第7题

There was once a man who spent all his time in his glasshouse. Flowers was his name, and f

lowers were his main joy in life. He grew flowers of every color under the sun. He grew these flowers in order to enter them for competition. His greatest hope in life was to grow a rose of an entirely new color that would win him the silver cup for the Rose of the Year.

Mr. Flowers' glasshouse was close to a public path, which was always used by children walking to and from school. Boys were often attracted to throw a stone or two at his glasshouse. So Mr. Flowers did his best to be in or close by his glasshouse at the beginning and end of the school day.

However, it was not convenient or possible to be on guard all the time. Mr. Flowers had tried in many ways to prevent harm to his glass; but nothing that he had done had been successful.

Then, just as he was giving up hope of ever winning the battle, and of growing the Rose of the Year, he had a truly wonderful idea. He put up a large notice made of good, strong wood, some metres away from the glasshouse, where it could be' clearly seen from the path. He had painted on the board the words: DO NOT THROW STONES AT THIS NOTICE. After this, Mr. Flowers had no further trouble. The boys were much more attracted to throw stones at the notice than at the glasshouse.

Mr. Flowers' great hope is ______.

A．to grow beautiful flowers

B．to grow the Rose of the Year and win a prize

C．to grow all kinds of flowers in the world

D．to take part in the competition

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第8题

In many stories on TV and in science-fiction books, men travel to faraway stars. They have quick, easy journeys. But so far, men have been able to reach only the earth’s own moon.

Suppose a man wanted to reach a distant star. Even if he traveled his whole life, he would have to move faster than the speed of the light. Nothing can move that fast except light itself.

Strange things happen to an object when it moves rapidly. The object weighs more. An object moving at 86 percent of the speed of light is twice as heavy as it is at rest. A stick appears shorter. A clock runs more slowly. A man would not age so fast as he would on the earth.

Light travels more than 186,000 miles a second, or about 11 million miles a minute. In one year, light travels six trillion miles. That great distance is called a light-year. It is used to measure distance in space.

The star closest to our sun is Alpha Centauri. It is more than four light-years away. If one traveled at the speed of light, he could make a round trip to Alpha Centauri in nine years. But, even at that speed, he could not reach Alcaid (北斗星) in the handle of the Big Dipper. A one-way journey to Alcaid would take almost 200 years

1．In this passage the words “closest to our sun” means the star（）.

A、the earth we live on

B、Alpha Centauri

C、the Big Dipper

D、the moon

2．A one-way journey to Alcaid would take（）.

A、about nine years

B、less than four years

C、almost 200 years

D、less than 100 years

3．Why do we measure the distance in light-years instead of miles?（）

A、Units of light-years sound better.