The author regards the notion that heat pumps have a genuine drawback as a
A.cause for regret
B.sign of premature defeatism
C.welcome challenge
D.focus for an educational campaign
第3题
A.No.2舱的底舱
B. No.3、No.4舱的底舱
C. No.1、No.2舱的二层舱
D. No.2、No.3舱的二层舱
第4题
A. 减小0.1125m
B. B.增加0.1125m
C. C.减小0.125m
D. D.增加0.125m
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