下列主要来保护露天配电设备的器件是()。
A.避雷针
B.避雷线
C.避雷器
D.避雷网
参考答案:A
________ there is going to be a policy change ________ of those things is going to change.
A.Unless; few
B.Until; few
C.Unless; none
D.Until; none
异位妊娠体征不包括()
A. * * 后穹饱满
B.直肠子宫陷凹有触痛结节
C.宫颈举痛
D.子宫漂浮感
E.子宫一侧有触痛包块