单项选择题
A.50~180KW B.10~1200KW C.120~2200KW D.350~35000KW
A.10~-10 B.-15~-18 C.4~-20 D.12~-24
A.R22单级+R13单级 B.R290单级或两级+R13单级 C.R22两级+R13单级或两级 D.R22两级+R13单级+R14单级
A.-60 B.-62.5 C.-66 D.-74
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