Everyone knows where the shop is, but who's the owner? ()
A. Steve.
B. Everyone does.
C. At the next door.
D. Yes, it‘s a secret.
查看答案
对于外锁闭装置及相差设备工、电部门维护分工是如何规定的?
无线接入系统在开通调试时,所选施主小区信号源一定要(),强度尽量比邻频高()以上,以便解决切换问题。
塑料基托一般厚约()
A. 2mm
B. 0.5mm
C. 1mm
D. 3mm
E. 2.5mm