选择题:18.(单选题)延长旅游点生命周期的根本办法,是( )(本题3.0分)A.市场宣传B.降价出售C.连

题目内容:
18.(单选题)延长旅游点生命周期的根本办法,是( )(本题3.0分)
A.市场宣传
B.降价出售
C.连续发展
D.延长成熟期
参考答案:

4、 Any solution for which the concentration is pre

4、 Any solution for which the concentration is precisely known is called a stand

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