— Tom, you are supposed to hand in the final-term paper next Friday.

— __________. [ ]

A. So what?

B. Well, I won't miss the deadline.

C. Really? Who told you that?

D. Oh, now I am under great pressure.

系统验收时属于A级缺陷的检验项目有（）。

A．消防水箱和消防水池的容量，室外给水管网的供水能力

B．主备电源的自动切换装置的可靠性

C．管道材质、管径、接头、连接方式、防腐防冻措施

D．信号阀应锁定在常开位置

E．系统流量和压力检测合格