单项选择题
A.252 B.204 C.186 D.102
A.1.53% B.1.56% C.1.62% D.1.73%
A.48.23 MJ/m3 ,40 MJ/m3 B.40 MJ/m3,30 MJ/m3 C.48.23 MJ/m3,42.3 MJ/m3 D.45 MJ/m3,42 MJ/m3