本题目来源于试卷: Freshwater Resources，类别为 IB环境系统与社会
[单选题]
Suggest two ways thate8) kwb n3prz)* sn.ev human7+ej g )o; mqzghhxf:t (o*4*sz4 xwag3(htbbs can improve their water supplies.
A. Method 1 is building reservoirs,Method 2 is using grey-water recycling
B. Method 1 is using desalination,Method 2 is increasing rainfall
C. Method 1 is rainwater capture,Method 2 is recharging aquifers
D. Method 1 is straightening rivers,Method 2 is conserving water
参考答案: C
本题详细解析:
Building reservoirs that hold water from rainfall for later use, qryy6)9i iu7x5.zkf hyq :: wywhen there may be less rainfall, can improve water supplies. Using grey-water recycling reduces demand for water. Therefore option A is incorrect.
Desalination can improve water supplies as we take water from the sea and remove the salt, thus creating more freshwater. There is a certain amount of cloud-seeding being employed in some countries to encourage the small water droplets in the air to stick together and fall as rain. However, this is not something that can be done structurally. Option B is incorrect.
Capturing rainwater in basins in cities or simply in barrels or ponds in gardens stores the water for later use. Changing landscaping in cities (plants instead of tiles) or in rural areas (bends in streams) can prevent water from running off and gives it more time to seep into the ground, thereby recharging aquifers and groundwater stores. Both improve water supplies. Option C is correct.
Straightening rivers means the water travels to the sea more quickly and does not have enough time to seep into the ground. This does not improve water supplies. Conserving water means that6u i q9hxy7q5:z:ki. yfy)ryw people use less water. This reduces demand. Option D is incorrect.
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