31.21×16+3.121×120﹢312.1×6.2的值是: A3121

Loveyou2019-12-17  6

问题 31.21×16+3.121×120﹢312.1×6.2的值是:A3121B2808.9C4125D3768

选项

答案B

解析[img]/upload/tiku/263/2964002_1.png[/img]
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