【判断题】【消耗次数：1】
挠率恒等于零的曲线是平面曲线.
①
正确
②
错误
参考答案：
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【简答题】
证明：平面曲线的挠率为零
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Im afraid it will
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Not at all
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one
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the one
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many
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it
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that
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anyone
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Im full now
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