—Do you think that man will come to your help?

—I really don’t know       a person like him can help me with.

A．how

B．what

C．why

D．if

优化由国家基准气候站、国家基本天气站、一般气象站和专业气象观测站组成的地面气象观测网属于（）发展目标。

A.地面气象观测

B.地基遥感探测

C.地基气候系统观测