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12.9/0.72+43.5/3.
人气:204 ℃ 时间:2020-04-10 12:18:42
解答
12.9/0.72+43.5/3.6
=129/7.2+43.5/3.6
=64.5/3.6+43.5/3.6
=108/3.6
=30
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