题目内容

【题目】淡水资源日益紧张，如果考虑现有的经济、技术能务，扣除无法取用的冰川和高山顶上的冰雪储量，理论上可以开发利用的淡水不到地球总水量的1%。由此可见，尽管地球上的水是“取之不尽”的，但适合饮用的淡水资源则是十分有限的。结合所学知识回答下列各题。

【1】目前人类比较容易利用的淡水资源是（ ）

A、河流水、湖泊水、地下水

B、地下水、河流水、冰川

C、雨水、河流水、湖泊水

D、河流水、淡水湖泊水、浅层地下水

【2】衡量一个国家或地区水资源丰歉程度的指标是（ ）

A、多年平均降水 量

B、多年平均蒸发量

C、多年降水量与径流量之和

D、多年平均径流总量

【3】水资源的分布不仅时间上分配不均，空间上也具有明显的差异。我国水资源时空分布的特点是（ ）

①东南多，西北少 ②西北多，东南少 ③夏秋多，冬春少 ④冬春多，夏秋少

A、①④ B、①③ C、②③ D、③④

【答案】

【1】D

【2】D

【3】B

【解析】

试题分析：

【1】目前人类比较容易利用的淡水资源是通常所说的水资源，主要是河流水、淡水湖泊水、浅层地下水，D对。深层地下水、冰川目前不能大量利用，A、B错。雨水 也是不易利用的水资源，C错。

【2】根据所学知识，衡量一个国家或地区水资源丰歉程度的指标是多年平均径流总量，径流总量越大，区域水资源量越丰富，D对。区域降水量不是通常所说的水资源，A、C错。多年平均蒸发量不能表示水资源的丰歉程度，B错。

【3】水资源的分布不仅时间上分配不均，空间上也具有明显的差异。我国水资源时空分布的特点是

东南多，西北少，①对，②错。夏秋多，冬春少，③对，④错。B对。

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