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【简答题】
At present, in order to meet the needs of matching the entire transmission system, the wheel reducer is a additional gearing mechanism which can reduce speed and increase torque.
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【简答题】Work in pairs. Search in the library or on the Internet for the information about the brand of the car you want. Make your choice of the brand of the car you would like to buy. Tell your partner which...
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A.
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B.
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C.
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【简答题】DNA多态性就是限制性片段长度多态性。
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