舞蹈式的主要功效有（）

A..增强小脑的平衡力，调节身体姿态

B.治疗关节炎

C.消除肌肉疲劳，滋养内脏器官

D.治疗失眠，眩晕

Mr. Black is not only strict _____his work but also is strict ____his children.[ ]

A. with, in  

B. on, with  

C. in, with

D. in, at