【题目】雨水收集系统是在缺水地区利用一些技术手段将屋顶的大气降水进行回收、处理、再利用的一种良性系统。回答下列问题。
【1】该系统改造的水循环环节是（ ）
A. 蒸发 B. 降水 C. 下渗 D. 径流
【2】该系统的主要功能是（ ）
A. 调解城市局地气候 B. 缓解城市用水紧张 C. 缩短径流汇聚时间 D. 减少土壤水分蒸发
【3】目前，人类生产和生活所需的淡水主要来自（ ）
A. 河流水、淡水湖泊水和浅层地下水 B. 冰川、河流水和地下水
C. 大气水、河流水和冰川 D. 地下水、河流水和湖泊水
【答案】
【1】D
【2】B
【3】A
【解析】
【1】 本题主要考查人类活动改造水循环的主要环节。根据材料，该系统是将雨水进行回收、处理、再利用的一种良性系统，没有使降水进入径流环节，改造的水循环环节是径流，D对。蒸发和下渗环节会受到影响，降水环节不受影响，但这些影响环节都不会被改造，故A、B、C错。答案选A。
【2】本题主要考查雨水收集系统的主要功能。根据材料，该系统是缺水地区回收雨水的一种良性系统，主要的功能是缓解城市用水紧张问题，B正确；不能调解城市局地气候 ，A错；延长了径流汇聚时间 ，B错；不能减少土壤水分蒸发，D错。故选B项。
【3】本题主要考查人类目前淡水的主要来源。目前人口可利用的地球淡水资源主要是河流、湖泊水和浅层地下水。故答案选A项。
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注意：1、词数：100左右
2、可适当增加细节，以使行文连贯
3、文章开头已给出
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1.词数100左右；
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