Most of us know we should cut down on fat, but knowing such things isn't much help when it ________

shopping and eating.[ ]

A. refers to  

B. speaks of

C. focuses on  

D. comes to

下列（）基础属于刚性基础。

A.钢筋砼条形基

B.砖砌大放脚基础

C.素砼基础

D.筏板基础

E.箱形基础