3万㎡办公楼,制冷机房面积估算应为()
A.100~120
B.200~300
C.500~600
D.700~800
参考答案:B
---I am afraid I don’t quite follow you .
---Let me make it ______. We do not want you here .
A.plain
B.absolute
C.original
D.moral
画一个射极跟随器式串联型直流稳压电路图。