A.0.9~1mm B.约1mm C.2.5mm D.1~1.5mm E.0.5~0.8mm支托凹成球凹面,深度为

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问题 A.0.9~1mm
B.约1mm
C.2.5mm
D.1~1.5mm
E.0.5~0.8mm

选项 支托凹成球凹面,深度为

答案D

解析
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