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【单选题】
磁性开关可以由( )构成。A.
继电器和电磁铁
B.
二极管和三极管
C.
永久磁铁和干簧管
D.
三极管和继电器
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举一反三
【单选题】___ three times in a row, the boxer decided to make a fourth attempt, though．
A.
Having defeated
B.
To have defeated
C.
Having been defeated
D.
To defeat
【单选题】A multinational corporation is a corporate enterprise, which though headquartered in one country, conducts its operations through branches that it owns or controls around the world. The organizations,...
A.
Because multinationals are more developed.
B.
Because multinationals bring investment and jobs.
C.
Because multinationals conduct their operations through branches.
D.
Because multinationals are wealthier.
【单选题】国家铁路的旅客票价率由（）。（客章）
A.
中国铁路总公司拟定，报国家物价主管部门批准
B.
铁路局拟定，报中国铁路总公司批准
C.
国务院铁路主管部门拟定，报国务院批准
D.
铁路局拟订，报国家物价主管部门批准
【简答题】国家铁路的旅客票价率由（）拟定，报（）批准。
【简答题】在下面表达式中选出值为 1 的表达式 _________ 。
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