–How can I make fewer mistakes in the exams?

–Try to be careful. _______ careful you are, _______ mistakes you will make.

A．The more ; the fewer

B．The more ; the less

C．More; less

D．More; fewer

在自然分层水蓄冷系统中，为了提高蓄冷能力，主要应( )。

A．减少蓄水槽内保温层厚度

B．减少蓄水槽向外界的传热量

C．增加蓄水槽的高度

D．减少水泵的消耗功率