单项选择题
A.1/4 B.1/3 C.1/2 D.2/3
A.0.3 B.0.5 C.0.7 D.0.8
A.90~160KW B.110~160KW C.110~200KW D.132~200KW
A.1.5 B.2 C.3 D.4
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