单项选择题
A.年检 B.季检 C.月检 D.周检
A.130mm B.140mm C.150mm D.160mm
A.1，1 B.2，1 C.1，2 D.2，2
A.110±10VDC B.110+22/-33VDC C.110+22/-33VAC D.220±10VAC
微信扫一扫,加关注免费搜题
