单项选择题
A.10%~19% B.20%~29% C.30%~39% D.40%~49% E.50%~59%
A.8~10g B.7~8g C.5~6g D.1.5~3g E.≤1g
A.0.43MJ B.0.66MJ C.0.83MJ D.0.88MJ E.0.94MJ