检修作业需要挂接地线,接地线的接地点与检修设备之间可以连有断路器、隔离开关或熔断器。第六章P102
参考答案:错
How long has he _____ from the school?[ ]
A. left
B. leaves
C. been away
D. is away
系统性红斑狼疮患者的皮肤护理,下列哪项不妥()
A.常用清水清洗
B.忌用碱性肥皂
C.忌用化妆品
D.避免阳光暴晒
E.10°C水局部湿敷