单项选择题
A.60﹪ B.80﹪ C.90﹪ D.100﹪
A.10mm B.8mm C.15mm D.6mm
A.0.20mm B.0.10mm C.0.15mm D.0.05mm
A.50℃±2℃ B.62℃±2℃ C.58℃±2℃ D.65℃±2℃
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