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

可屈0°～180°且伸0°～50°的关节是（）

A.肩关节

B.肘关节

C.腕关节

D.髋关节

E.膝关节