单项选择题
A.变小B.变大C.不变D.无关
A.6%B.7%C.8%D.9%
A.B/8+7.4B.B/8+8.4C.B/6+7.4D.B/6+8.4
A.37cm,68cmB.37cm,70cmC.38cm,68cmD.38cm,70cm
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