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We can't live without water, but now the water was polluted(污染）. It is the big problem（问题）. So we must find a way to work this problem out. Water is an important resource（资源）. In our daily life, we often leave the tap on after cleaning hands. Sometimes we litter in the river, so the water was polluted by us. I think we should save water. Don’t let the last drop（滴） of water on the Earth becomes our last tear（眼泪）.
1．This passage(短文) is mainly about the air pollution.2．We often forget to turn off the tap after cleaning hands.
3．Water pollution is not the big problem now.
4．We shouldn’t care about（关心） the water pollution.
5．If we go on wasting water, there is no water at last.
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
