测量绝缘电阻及直流泄漏电流通常不能发现的设备绝缘缺陷是()。
A.贯穿性缺陷;
B.整体受潮;
C.贯穿性受潮或脏污;
D.整体老化及局部缺陷。
参考答案:D
根据句意用括号中单词的适当形式填空,使句子的意思完整、正确。
小题1:I am afraid of_________(mouse).They are so terrible.
小题2:You can feel the ________(great)of these famous scientists.
小题3:He plays the guitar__________(wonder),and we all like it.
小题4:Our English teacher has over twenty years’ teaching_________(experience).
小题5:Wang Yaping is the first person_______(teach)in space.
关于头虱错误的是()
A.多见于妇女、儿童
B.虱咬处可见红斑、丘疹
C.瘙痒不剧烈
D.抓破后有血痂
E.常伴臭味