A.b+2h/bh B.bh/(b+2h) C.2(b+h)/bh D.b

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问题 A.b+2h/bhB.bh/(b+2h)C.2(b+h)/bhD.bh/2(b+h)

选项 A.b+2h/bh
B.bh/(b+2h)
C.2(b+h)/bh
D.bh/2(b+h)

答案 B

解析
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