单项选择题
A.170±2 B.170±4 C.165±2 D.165±4
A.0.5 B.0.55 C.0.6 D.0.65
A.0.05-0.5 B.0.05-0.8 C.0.05-1.0 D.0.05-1.20
A.98-294 B.196-294 C.196-392 D.294-392
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