问题
单项选择题
电动机的正、反转控制电路中,为实现互锁功能,在FC接触器线圈支路中,应串联()触点。
A、ZC的常闭
B、ZC的常开
C、FC的常闭
D、FC的常开
答案
参考答案:A
电动机的正、反转控制电路中,为实现互锁功能,在FC接触器线圈支路中,应串联()触点。
A、ZC的常闭
B、ZC的常开
C、FC的常闭
D、FC的常开
参考答案:A
根据短文内容,用所给词的正确形式填空,使短文完整、正确。(每个词只能用一次)
Once he stayed there for about two 小题2:_.When New Year was coming, he went back home to see his wife and children. On his way home, something was_小题3:_ with his eyes .When he knocked on his door, his dog _小题4:_ out and was not friendly to him. His wife hurried to drive it away. The next morning he went to see a doctor. The doctor looked over his eyes_小题5:_ and gave him some_小题6:.Before he left, he told the doctor about his dog. When he 小题7:this, the doctor began to laugh and said," Maybe something is wrong with your dog's eyes, too. ".__小题8:_ he got home, he told his wife about it. The woman said, "I'm afraid it's true. If a thief comes小题9: our house, it won't see him and he'll steal something here."Mr. Shute thought his wife was right. He then made his dog __小题10: his medicine instead. |