问题 选择题

下列各组线段中,能成比例的是[ ]

A.1cm,3cm,4cm,6cm

B.30cm,12cm,0.8cm,0.2cm

C.0.1cm,0.2cm,0.3cm,0.4cm

D.12cm,16cm,45cm,60cm

答案

答案:D

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