A.-10℃ B.10℃ C.30℃ D.60℃
A.0.005~0.01 B.0.035~0.069 C.0.01~0.015 D.0.1~0.2
A.0.01%~0.02% B.0.02%~0.03% C.0.08%~0.09% D.0.2%~0.3%