单项选择题
A.<1% B.5% C.10% D.15% E.20%
A.0~5% B.5%~10% C.10%~15% D.15%~20% E.20%~25%
A.同侧Ⅰ~Ⅲ区及RPN区 B.同侧Ⅰ~Ⅳ区及RPN区 C.同侧Ⅰb~Ⅲ区及RPN区 D.同侧Ⅰb~Ⅴ区及RPN区 E.同侧Ⅱ~Ⅳ区及RPN区