专升本英语（阅读理解）模拟试卷3
阅读理解
If half of the water were to be drained from the Pacific Ocean, a curious kind of submarine mountain called a guyot would be exposed. Guyots are strange formations that resemble mushroom stalks with flat tops. More than six hundred and fifty of these volcanic stalks have been discovered in the Pacific Ocean, and a few others have been discovered in the Atlantic sea plains.
It is easy to suppose that the guyots were formed by underwater lava spouts that piled up volcanic debris over the years, but just how they acquired their curiously flat tops remains a mystery. Shallow-water fossils found embedded(植入) in the tops of some guyots suggest that at one time the flat tops were much nearer the ocean\’s surface, but beyond this there is little that scientists can say.
One attempt to account for the flat tops suggests that the ocean levels were once much lower than they are today; thus wave action might have smoothed away the original peaks. Another theory holds that the guyots have probably always flat tops and that their weight has pushed them slightly toward the ocean floor, causing them to slowly submerge. But these are only theories—the guyots are still a geophysical puzzle.
1.The strange formations called guyots are actually________.(B)
A. underwater volcanoes
B. volcanic debris
C. mushroom stalks with flat tops
D. submerged sea plains
解析：文章第二段It is easy to suppose that the guyots were formed by underwater lava spouts that piled up volcanic debris(残骸)over the years．可知B正确。
2.Scientist are puzzled by the guyots’________.(C)
A. mushroom like appearance
B. submarine location
C. curiously flat tops
D. origin
解析：文章第二段but just how they acquired their curiously flat tops remains a mystery．文中的mystery即题目中的puzzle。
3.The discovery of shallow-water fossils indicates that the guyots were________.(C)
A. submerged by their own weight
B. flattened by the action of waves
C. not so deep in the ocean
D. formed by underwater lava spouts
解析：文章第二段Shallow-water fossils found embedded(植入)in the tops of some guyots suggest that at one time the flat tops were much nearer the ocean’s surface．即选C。
4.The guyots are still a geophysical puzzle nowadays because________.(C)
A. no explanation of their origin has yet been offered
B. scientists have not yet offered any explanation of their shapes
C. theories relating to their origins and shapes have never been proved
D. scientists are not sure the ocean levels have changed
解析：文章第三段But these are only theories—the guyots are still a geophysical puzzle．可知两个假设只是理论没有被证实。
5.We can conclude from this passage that________.(D)
A. there are guyots in every ocean of the world
B. guyots are produced by violent volcanic action
C. the mystery of the guyots will soon be solved
D. the guyots’ flat tops will remain a mystery for some time
解析：文章中反复出现but just how they acquired their curiously flat tops remains a mystery，but beyond this there is little that scientists can say．But these are only theories一the guyots are still a geophysical puzzle．故选D。
There is no denying that students should learn something about how computers work, just as we expect them at least to understand that the internal-combustion engine (
本文档预览：3500字符，共17083字符，源文件无水印，下载后包含无答案版和有答案版，查看完整word版点下载
