人工福利费中,工会基金按工资总额的()计算。
A.2%
B.3%
C.4%
D.5%
参考答案:A
试阐述在哪些特定情况下,设定电压应提高?
Sleeping with the lights on is a waste. You'd better______all the lights are off before you go to bed.
[ ]
A. look for
B. try out
C. make sure
D. think hard