单项选择题
A.1% B.2% C.3% D.4% E.5%
A.头颈部（发部、面部、颈部）9% B.双上肢（双上臂、双前臂、双手）18% C.躯干（躯干前、躯干后、会阴）27% D.双臀部9% E.双下肢（双大腿、双小腿、双足）46%