单项选择题
A.绝热 B.绝冷 C.保热 D.保温
A.-157℃~-163℃ B.-160℃~-166℃ C.-154℃~-160℃ D.-151℃~-157℃
A.0.5%~4.1% B.1%~12% C.5%~15% D.10%~20%