单项选择题
A.9~10级 B.3~4级 C.5~6级 D.7~8级
A.4.0,1.2 B.3.5,1.05 C.5.0,1.5 D.3.5,0.0175
A.身体活动 B.运动锻炼 C.基础代谢 D.食物生热效应