在除氧器滑压运行的情况下，机组负荷突然下降时，其（）反而会更好。
参考答案：除氧效果
— Helen, we your report. Is it ready?
— Yes, it is. I just want to look it over and then I'll send it. [ ]
A.didn't receive
B.haven't received
C.hadn't received
D.don't receive
与十进制数200等值的十六进制数为( )。
A．A8B．A4C．C8D．C4
