A. | did; do | B. | would; do | C. | had; done | D. | were; doing |
科目:高中英语 来源: 题型:选择题
A. | everything | B. | something | C. | anything | D. | nothing |
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科目:高中英语 来源: 题型:选择题
A. | It doesn't matter. | B. | No,go ahead. | ||
C. | Yes,please. | D. | Never mind. |
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科目:高中英语 来源: 题型:选择题
A. | Take | B. | Taking | C. | To take | D. | Taken |
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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. | Yes,I could | B. | No,I couldn't | ||
C. | Ok,I'd be glad to | D. | No,you can't |
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科目:高中英语 来源: 题型:选择题
A. | expecting | B. | to expect | C. | expected | D. | having expected |
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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: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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