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15.淡水fresh water.

分析 淡水fresh water

解答 答案是fresh water;考查词义识记;fresh water淡水;如:Rivers are fresh water.河流通常是淡水.

点评 对于单词短语的识记,要从词义着手,理解词性和常见用法或搭配,并能在语境中灵活运用.

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