A.1000℃~1100℃ B.1100℃~1180℃ C.1200℃~1280℃ D.1300℃~1380℃
A.200℃ B.300℃ C.400℃ D.500℃
A.30%,70% B.70%,30% C.50%,50% D.40%,60%