A.150倍 B.250倍 C.350倍 D.450倍
A.2.2%~81% B.2.8%~93% C.3.3%~18% D.12.5%~80%
A.2700~3000℃ B.3050~3150℃ C.3100~3300℃ D.3500~3700℃