A. 0.8 B. 0.6 C. 0.473 D. 0.233C

Freeti2019-12-17  14

问题

选项 A. 0.8 B. 0.6 C. 0.473 D. 0.233

答案C

解析[img]/upload/tiku/37/5850141_1.jpg[/img]
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