UPS电源的组成部分包括()
A.整流充电器
B.逆变器
C.电池组
D.静态开关
参考答案:A, B, C, D
A proposal came up at the meeting _____the protection of giant pandas in Sichuan.
A.was concerned with
B.concerned about
C.concerning
D.to concern
薪酬预算的外部内部环境对薪酬预算会产生哪些影响?