单项选择题
A.0.1~0.2 B.0.2~0.3 C.0.2~0.6 D.0.4~0.8
A.20~35℃ B.25~35℃ C.20~30℃ D.15~30℃
A.氯乙烯 B.氧气 C.氨气 D.氢气