单项选择题
A.8KW B.4KW C.12KW D.6KW
A.20% B.30% C.40% D.50%
A.5~10% B.10~15% C.15~20% D.5~15%
A.100*100*100mm B.150*150*150mm C.200*200*200mm D.70.7*70.7*70.7mm
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