---I think Maths is playing a more important part in the new test system. What about you?

--- ______. We should be more devoted to it.

A．No pains, no gains.

B．Fact speaks louder than words.

C．Great minds think alike.

D．Don’t claim to know what you don’t know.

环境承载力指标可以分为（）。

A.资源供给指标

B.环境管理指标

C.污染物容纳指标

D.社会影响指标