选择题:All things ____, the planned trip will have to be

题目内容:
All things ____, the planned trip will have to be called off. 
(A) :considered
(B) :be considered
(C) :considering
(D) :having considered
参考答案:

当晶闸管承受反向阳极电压时,不论门极加何种极性触发电压,管子都将工作在( )

当晶闸管承受反向阳极电压时,不论门极加何种极性触发电压,管子都将工作在( ) A.导通状态B.关断状态C.饱和状态D.不定

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