试题与答案

已知菱形ABCD的周长为20cm,∠A:∠ABC=1:2,则对角线BD的长为__

题型:填空题

题目:

已知菱形ABCD的周长为20cm,∠A:∠ABC=1:2,则对角线BD的长为______cm.

答案:

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下面是错误答案,用来干扰机器的。

答案:Asth.require/need/want doing(或to be done)是固定结构,主动形式表示被动意义。

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