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[originaltext] The ground water can be divided into "soft water" and "hard w
[originaltext] The ground water can be divided into "soft water" and "hard w
游客
2023-07-23
55
管理
问题
The ground water can be divided into "soft water" and "hard water". Soft water has few impurities or none at all while hard water contains some more dissolved minerals. In general, hard water is drinkable, but it may have a slight taste because of various minerals.
One place where hard water can be found is a ground underlying a base of limestone and shale. Rainwater dissolves materials as it comes down and this results in water’s taste and hardness.
We can sometimes find ground water that is almost as soft as rainwater under a bare sandy area. These clays hard water from the underground is popular among the citizens of this country. They believe that mineral water is good for health, but some hard water has the dissolved minerals that are harmful to our body.
Scientists suggest that all the ground water should be specially treated before, it is sold.
选项
A、We should drink more hard water.
B、We should drink mere soft water.
C、Ground water is good for the elderly people.
D、Ground water has to be, treated before we drink it.
答案
D
解析
事实细节题。从"Scientists suggest that all the ground water should be specially treated before it is sold. "可知,科学家建议地表水必须在经过处理后才能饮用。
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