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Scientists expect that the life，if found in deeper water below the ice sheet__________.
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更多“Scientists expect that the lif…”相关的问题
(52)
It can be inferred from the text that______.
A．discoveries of new planets set scientists thinking
B．extrasolar planets exist in the universe
C．solar system should be re-examined by mankind
D．new discovery depends on new theory
When did the scientists start working on a successor to the shuttle？
A．Immediately after the Columbia disaster.
B．One year after the Columbia disaster.
C．Years before the explosion of Columbia.
D．Not mentioned in the passage.
How did scientists determine the age of the universe？
A．By observing the oldest stars in the universe.
B．By studying the nearest stars that can be seen.
C．By fixing the age of the oldest stars in the Galaxy.
What do scientists think causes dreams？
A．Sleep.
B．Scientists have not found the reason up to now.
C．REM sleep.
D．It is not mentioned in the article, but scientists have known it.
PPL scientists will try to solve their problem by
[A] removing the sugar molecule on the surface of pig cells.
[B] distinguishing human tissues form. those of pigs.
[C] using the sugar-free nucleus in cloning a pig.
[D] taking out the sugar genes from the cell of a pig.
Why does the author dwell upon the concept of science in this article？
A．He wants to get the name right for scientists who are not in the field of exact science.
B．He wants to show that scientists can be wrong.
C．He just wants to show the right concept to the confused people.
D．He wants to make the concept clear so that people can have the right education.
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.
(33)
A．Beasts.
B．Herbivorous.
C．Carnivorous.
D．Dinosaurs.
回答（49）题 查看材料
A.Scholars differ in interpreting the purpose of the designs.
B.The largest picture may have been the sites for special ceremonies.
C.He called Nazca "the largest astronomy book in the world".
D.A Swiss writer named Erich von Daniken wrote that the Nazca lines were designed as a landing place for UFOs.
E.Other scientists are now searching for evidence to prove this.
F.Seen from the ground， it looks like lines scratched into the earth.
