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="                                                       "  (    )

A:2

B:4i

C:4

D:

上一题 下一题 0.0难度 选择题 更新时间:2018-01-06 10:05:55

答案(点此获取答案解析)

D

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已知圆C:(x﹣3)2+(y﹣4)2=4.

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