單項(xiàng)選擇題
A.5% B.10% C.15% D.20%
A.0.5-1mm B.1-1.5mm C.1.5-2mm D.2-2.5mm
A.30% B.40% C.50% D.70%
A.10% B.15% C.20% D.25%
A.40% B.50% C.60% D.70%
A.5° B.10° C.15° D.20°
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