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【单选题】
对于等高线而言，下面那种说法是错误的( )。
A.
同一等高线上的点的高程相等
B.
等高线一定是的连续曲线
C.
等高线在任何地方都不相交
D.
等高线与山脊线、山谷线正交
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be spoken to politely
D.
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