物资完好率公式?
参考答案:
— Shall I buy a cup of tea for you?
— _______. (不, 不要)
A. No, you won't
B. No, you aren't
C. No, please don't
D. No, please
对空气进行冷却减湿处理可利用()。
A.喷水室
B.表面式换热器
C.电加热器
D.固体吸湿剂