A.they have to swim fast to avoid danger in the rapidly evaporating lake
B.they have to swim fast to catch the animal organisms on which they survive
C.they have to multiply as many as possible within thirteen days
D.they have to complete their life cycle within a short span of time permitted by the environment
单选题 | What will probably follow this passage? | 查看答案 |
单选题 | The word “dormant” (Para. 4, Line 3) most probably means ________. | 查看答案 |
单选题 | He had been completely exhausted but felt considerably ________ after a meal and a rest. | 查看答案 |
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单选题 | From the context, the word “disconcerting” (Para. 3, Line 2) most probably means ________. | 查看答案 |
单选题 | Medical doctors sometimes can make mistakes that will cost ________. | 查看答案 |
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单选题 | Louis was asked to ________ the man who stole her purse. | 查看答案 |
单选题 | The new tourist hotel will have ________ for more than one thousand people. | 查看答案 |
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单选题 | According to the writer, personal discoveries ________. | 查看答案 |
单选题 | Humidity is so intense in some parts of the tropics that Europeans find they are unable to ________ it. | 查看答案 |
单选题 | By saying “for the shrimps it is a race against time” (Para. 3, line 2) the author means ________. | 查看答案 |
单选题 | They are sure they have all the facts they need to ________ the existence of a black hole. | 查看答案 |
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单选题 | The sight of a sick horse being driven along the streets of the village remained ________ him for weeks. | 查看答案 |
单选题 | In no circumstances can more work be got out of a machine than ________. | 查看答案 |