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【简答题】
有一个圆柱体的零件，高10厘米，底面直径是6厘米，零件的一端有一个圆柱形的圆孔，圆孔的直径是4厘米，5厘米（如图）．如果将这个零件接触空气的部分涂上防锈漆，那么一共要涂多少平方厘米？
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反馈参考答案：
举一反三
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A.
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B.
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C.
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D.
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