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【单选题】
有压泄水的断面形状一般为( )A.
矩形
B.
圆形
C.
城门洞形
D.
马蹄形
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反馈参考答案：
举一反三
【单选题】The battle was over, and the wounded _______ sent to hospital and the dead _______ buried.
A.
was; was
B.
were; were
C.
is; is
D.
are; are
E.
was；were
【简答题】The battle was over without a shot _______(fire).
【简答题】The battle was over, and the wounded (send) ____________ to hospital at once.
【简答题】The battle was over, and the wounded(send)____to hospital at once.
【单选题】在三相异步电动机接触器互锁正反转控制电路中,正转接触器KM1和反转接触器KM2之间互锁的连接方法是
A.
KM1的线圈与KM2的动断（常闭）辅助触点串联，KM2的线圈与KM1的动断（常闭）辅助触点串联
B.
KM1的线圈与KM2的动合（常开）辅助触点串联，KM2的线圈与KM1的动合（常开）辅助触点串联
C.
KM1的线圈与KM2的动断（常闭）辅助触点并联，KM2的线圈与KM1的动断（常闭）辅助触点并联
D.
KM1的线圈与KM2的动合（常开）辅助触点并联，KM2的线圈与KM1的动合（常开）辅助触点并联
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