—I think robot will play an important role in our life. Don’t you think so?

—Yes. _________________________.

A．No pains, no gains

B．Early birds catch worms

C．Great minds think alike

D．Facts speak louder than words

引蒸汽时待倒淋见蒸汽后开大（）。

A、旁通阀

B、倒淋阀

C、蒸汽总阀