题目内容
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提问人：网友zhongheng001
发布时间：2022-01-06
[主观题]
Mathematical Principles of Natural Philosophy （1687) written by set science on its modern course.
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| There are five pairs ______, but I am at a loss ________. |
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| A. to choose from, what to buy B. to choose, which to buy C. to choose from, which to buy D. to be chosen, which to buy |
