题目内容：
作为理想的饮用水水源首选应是（ ）
A．降水 B．水库水
C．江河水
D．深层地下水
E．浅层地下水
参考答案：
答案解析：
单选题：作为理想的饮用水水源首选应是（ ）
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B．水库水
C．江河水
D．深层地下水
E．浅层地下水
B．水库水
C．江河水
D．深层地下水
E．浅层地下水
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