— What good weather! Let's go boating on the lake! 

—           . [ ]

A. That's all right

B. Thank you very much

C. It doesn't matter

D. That's a good idea

交流限流式配电电器在极限通断能力实验时，限流电器的限流系数应不大于()。

A．0.5

B．0.6

C．0.7

D．0.8