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问题
单项选择题
几个开关串联的门电路是()
A.与门电路
B.或门电路
C.非门电路
D.与非门电路
答案
参考答案:
A
选择题
John behaved so strangely today. I thought he wasn't acting like _______.
A. him
B. himself
C. he would
D. he does
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单项选择题
脑脊液分泌过多或吸收障碍所致()
A.脑积水
B.神经管缺陷
C.双输尿管
D.马蹄肾
E.膀胱外翻
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