单项选择题
A.12~14CM B.14~16CM C.16~18CM D.18~20CM E.20~22CM
A.2~3CM B.4~6CM C.7~8CM D.7~9CM E.9~10CM
A.硫化氢味 B.烂苹果味 C.氨臭味 D.粪臭味 E.酸臭味