A. | What's it | B. | What's up | C. | Can I help you | D. | Where to |
科目:高中英语 来源: 题型:选择题
A. | have tried | B. | had tried | ||
C. | have been trying | D. | had been trying |
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科目:高中英语 来源: 题型:选择题
A. | closing;Don't worry! | B. | open; Let's wait | ||
C. | opening; I'm afraid | D. | closed;Be patient! |
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科目:高中英语 来源: 题型:选择题
A. | involved | B. | involving | C. | toinvolve | D. | beinginvolved |
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科目:高中英语 来源: 题型:选择题
A. | It depends | B. | That is all right | ||
C. | Sounds great | D. | With pleasure |
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科目:高中英语 来源: 题型:阅读理解
The Magnetic Sense-The Living Compass | |
Passage outline | Supporting details |
The existence of the earth magnet and the invention of the navigating compass | ◇Our earth is a big magnet and a little freely (71)swinging magnetic needle lines itself with the earth magnet to point north and south. ◇(72)Basedon the idea above,the navigating compass was invented. |
The possibility of birds'built-in compasses | ◇One piece of evidence is the (73)migrationof many birds between their summer homes and winter homes. ◇Birds can recognize star patterns on clear nights and keep on course (74)even under cloudy skies |
The (75)experiments/tests/study/research on pigeons'and bees'built-in compasses | ◇Little magnets were tied to the pigeons'heads to (76)block their magnetic sense. ◇The pigeons'magnetic sense seemed to be affected on (77)cloudydays. ◇Similar things with the same results were done with bees. |
The (78)discovery of the magnetic stuff for the animal compass | ◇Little rod-like bacteria were found by chance to swim together in the direction of (79)north. ◇Some animals had a chain of dense magnetic particles in or close to the (80)brain(s) inside their bodies. |
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科目:高中英语 来源: 题型:阅读理解
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科目:高中英语 来源: 题型:选择题
A. | shouldn't | B. | mustn't | C. | can't | D. | wouldn't |
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科目:高中英语 来源: 题型:选择题
A. | to turn down | B. | turning down | C. | turned down | D. | turn down |
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