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第1题

He wants to be ________ Newton and Einstein. A.a great scientist as B.as great a scientist as C.as a great scientist
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第2题

某步进电动机，三相，转子40个齿，欲使其步距0.5°，应采用的通电方式为（） A.单拍制 B.双排制 C.单双拍制 D.细分电路
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第3题

The Argentine icebreaker Almirante Irizar, which left Buenos Aires on Tuesday, is expected to join the South African res
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第4题

You ________ him about this since he could find out for himself. A. needn.t tell B. need tell C. need have told D.ne
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