Don't ____ in the bathroom. [ ]
A. played
B. playing
C. play
C
鉴定矿物类中药的透明度时,应将矿物磨成的标准厚度是()
A.0.03cra
B.0.03mm
C.0.03μm
D.0.03nm
E.0.03dm
简述更换220KV耐张杆塔双联单片绝缘子的具体操作步骤?