It shocked Lucy’s parents ________ she were not given timely treatment, she would suffer from a cough for the rest of her life.

A．that

B．if

C．that if

D．if that

资源利用水平随着经济技术的进步不断突破原有界限，从而不断推进产业结构中朝阳产业的成长，这是产业的( )。

A．结构合理化

B．结构高度化

C．均衡发展

D．发展效率