题库
题库
A．Some regularity in the changes of the earth’s magnetic field.
B．Some causes of the fluctuation of the earth’s magnetic field.
C．The origin of the earth’s magnetic field.
D．The frequency of polarity reversals.
| 单选题 | American colleges and universities failed to graduate half of their four-year degree candidates because ________. | 查看答案 |
| 单选题 | The reason why people might not be able to stay alive in a world without emotion is that ________. | 查看答案 |
| 单选题 | The court considers a financial ________ to be an appropriate way of punishing him. | 查看答案 |
| 单选题 | By saying that “in too many academic fields, the work has no context” (Lines 4-5, Pare. 1) the author means that the teaching in these areas ________. | 查看答案 |
| 单选题 | In Peter Oslo’s opinion the French experiment ________. | 查看答案 |
| 单选题 | Emotions are significant for man’s survival and adaptation because ________. | 查看答案 |
| 单选题 | The reduction of the possible hazards in food ultimately depends on ________. | 查看答案 |
| 单选题 | It is very strange but I had an ________ that the plane would crash. | 查看答案 |
| 单选题 | The goal is to make higher education available to everyone who is willing and capable ________ his financial situation. | 查看答案 |
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| 单选题 | He will ________ resign in view of the complete failure of the research project. | 查看答案 |
| 单选题 | The original elections were declared ________ by the former military ruler. | 查看答案 |
| 单选题 | The kitchen was small and ________ so that the disabled could reach everything without difficulty. | 查看答案 |
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| 单选题 | One of the reasons for the current crisis in American colleges and universities is that ________. | 查看答案 |
| 单选题 | What have the two French geophysicists discovered in their research? | 查看答案 |
| 单选题 | Even when textbooks are ________ through a school system, methods of teaching may vary greatly. | 查看答案 |