断路器切断载流电路时,是指动静触头分开。
参考答案:错
It doesn't make any____now what he says -- it's too late for apologies.
A.difference
B.effect
C.progress
D.development
关于伤口渗液的颜色描述正确的是()
A.干稻草色(浆液)
B.淡红色或粉红色(浆液)
C.黄色或褐色(脓性渗液)
D.淡绿色(脓性渗液)