A. 0.667; B. 0. 85; C. 1. 20; D. 0. 56?

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问题 A. 0.667; B. 0. 85; C. 1. 20; D. 0. 56?

选项 A. 0.667; B. 0. 85; C. 1. 20; D. 0. 56?

答案 A

解析
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