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A．It may exist in the neighborhood of big stars.
B．It may exist in the neighborhood of a galaxy.
C．It may exist at the center of X-rays.
D．It may exist at the center of a galaxy.
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听力原文： Man is a land animal,but he is also closely tied to the sea.Throughout history the sea has served the needs of man.The sea has provided man with food and a convenient way to travel to many parts of the world. Toady,experts believe that nearly two-thirds of the world's population live within eighty kilometers of the seacoast.In the modem technological world,the sea offers many resources to help mankind survive.Resources on land are beginning to grow less.The sea,however,still offers hope to supply many of man's needs in the future.The riches of the sea yet to be developed by man's technology are impressive.Oil and gas explorations have existed for nearly thirty years.Valuable amounts of minerals such as iron,copper exist on the ocean floor.Besides oil and gas,the seas may offer new sources of energy.For example,warm temperature of the ocean can be used as the steam in a steamship.Sea may also offer a source of energy as electricity for mankind.Technology is enabling man to explore even deeper under the sea.It is obvious that the technology to harvest the sea continues to improve.By the 2050,experts believe that the problems to explore the food, minerals and energy resources of the sea will have been largely solved.
What do we learn about the sea in the modem technological world？
A．It is the largest supplier of valuable minerals.
B．It will disappear in about thirty years.
C．It is beginning to grow smaller and smaller.
D．It offers many resources to help mankind survive.
What can be inferred about the gap between teachers and undergraduates？
A．It will not exist in future.
B．It would never disappear.
C．It may practically be avoided.
D．It should be bridged.
What is a possible negative effect of olestra according to some critics？
A．It may impair the digestive system.
B．It may affect the overall fat intake.
C．It may increase the risk of dancer.
D．It may spoil the consumers' appetite.
What is a possible negative effect of olestra according to some critics？
A．It may impair the digestive system.
B．It may affect the overall fat intake.
C．It may increase the risk of cancer.
D．It may spoil the consumers' appetite
A．It may not be warm enough.
B．The woman can wear it all winter.
C．It will not fit if the woman loses weight.
D．The woman may have trouble paying for it.
听力原文： It was not until one hundred and fifty years ago that scientists learned about the existence of dinosaurs. Thanks to an English doctor and his wife, the door was opened to this zoological study. Reasoning that these animals' tremendous size must have made them terrible creatures, scientists combined two Greek words, deimos, meaning terrible, and sauros, meaning lizards, to form. the word dinosaur.
After many years of study, they determined that these beasts roamed the earth for millions of years, and ceased to exist some sixty million years ago.
Unbelievable as it may seem, not all dinosaurs were carnivorous, that is, meat eating. Many were herbivorous, or vegetarians.
By reassembling the bones found at digging sites, scientists have been able to reconstruct the skeletons and learn great deal about the dinosaur's living conditions. They have learned that dinosaurs inhabited not only the land, but also the water and sky.
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A．Beasts.
B．Herbivorous.
C．Carnivorous.
D．Dinosaurs.
At the end of the passage the author suggests that ______.
A．it is impossible for life to exist on planets
B．earthlike life could only exist on a few planets
C．life could exist on only one planet in a million
D．life could exist on a great number of planets
At the end of the passage the author suggests that（）
A．it is impossible for life to exist on other planets.
B．earthlike life could only exist on a few planets.
C．life could exist on only one planet in a million.
D．life could exist on a great number of planets.
A．It does not make any contribution to the world peace.
B．It should not exist any longer.
C．It is the best organization toward peace.
D．It has been successful as many hoped.
The author admits that a degree of Americanization does exist because ______.
A．it is a long-term historical trend of the world
B．industrial societies are almost exact copies of the United States
C．the Internet and TV promote the spread of American social and cultural habits
D．local cultures are gradually weakened over the course of the 21st century.
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