更多"Over the centuries, __________ that"的相关试题:
[单项选择]Various efforts have been made over the centuries to predict earthquakes, including observing lights in the sky and ______ animal behavior.
A. absurd
B. abnormal
C. exotic
D. erroneous
[单项选择]Over the centuries, scientists have been trying hard to find satisfactory substitutes for precious stones but failed many times.
Many years ago, a chemist surprised the world by saying: It should be possible to make a precious stone that not only looks like the real thing, but that is the real thing. The only difference should be that one crystal would be made by man, the other by nature.
At first this did not seem like a particularly hard task. Scientists began to try making synthetic diamonds towards the end of the eighteenth century and discovered a key scientific fact: diamonds are a form of carbon, which is a very common element.
Then, why not change a cheap and plentiful substance, carbon, into a rare and expensive one, diamond This change takes place in nature, so it should be possible to make it happen in the laboratory.
It should be possible, but for 150 years every effort failed though several people believed that they had solved the diamond riddle
A. it is a real thing that man was able to make a precious stone as nature can do.
B. man should be able to make a precious stone that is exactly the same as a natural one.
C. there is only a little difference between a man-made crystal and a nature-made one.
D. scientists expect a small difference between a man-made crystal and a nature-made one.
[单项选择]Many a language （ ） extinct over the centuries and some are near extinction.
A. have become
B. has become
C. had become
D. was become
[填空题]It is no good (try) ______ to explain it to her; she’s too young.
[填空题]Between seventeenth and eighteenth centuries when tea was first introduced into England there was competition between coffee houses and pubs to gain popularity of tea and liquor.
[单项选择]
Passage Three
For centuries, explorers have risked
their lives venturing into the unknown for reasons that were to varying degrees
economic and nationalistic (国家主义的). Columbus went west to look for better trade
routes to the Orient and to promote the greater glory of Spain. Lewis and Clark
journeyed into the American wilderness to find out what the U. S. had acquired
when it purchased Louisiana, and the Appolo astronauts rocketed to the moon in a
dramatic show of technological muscle during the cold war.
Although their missions blended commercial and political military
imperatives, the explorers involved all accomplished some significant science
simply by going where no scientists had gone before.
Today Mars
looms (隐约出现) as humanity’s next great terra incognita (未探明之地). And with growing
emphasis on international cooperation in large spa
A. to display their country’s military might
B. to accomplish some significant science
C. to find new areas for colonization
D. to pursue commercial and state interests
[填空题]explain promise apologize thank admit refuse suggest advise
I’ll definitely let you have the details tomorrow.
______
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