单选题：Historical weather data are necessary in

题目分类：理工类
题目类型：单选题
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题目内容：

Historical weather data are necessary in A．the persistence method and the trends method.
B．the trends method and the climatology method.
C．the climatology method and the analog method.
D．the persistence method and the analog method.

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分类：理工类题型：单选题

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