单项选择题
A.合格 B.不合格 C.勉强合格 D.以上说法都不正确
A.5mm±1mm B.4mm±1mm C.5mm±0.5mm D.4mm±0.5mm
A.125mL B.140mL C.142.5mL D.150mL
A.20% B.26% C.30% D.50%
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