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【单选题】
船舶同步发电机发电电压过低的主要原因不包括 。A.
整流桥中有一个整流元件短路或断路
B.
转速太低
C.
励磁绕组部分断路
D.
整定电阻阻值太小或者电抗器气隙太小
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举一反三
【单选题】I shall tell him the truth, ______.
A.
no matter whether he likes it or not
B.
whether he likes it or not
C.
no matter he likes it or not
D.
whether he would like it or not
【简答题】A．To find out whether he wants to go canoeing. B．To tell him whether her car is repaired. C．To find out what kind of food he is bringing. D．To tell him what time they are leaving.
【单选题】There is often enough information on the card to tell you ______ or not.
A.
whether the book will be useful
B.
if will the book be useful
C.
whether will the book be useful
D.
whether will be useful the book
【简答题】We can tell whether someone suffers from depression or not by ______.
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