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Water is in ponds, rivers, lakes and oceans (大海). Most of water we see is a liquid (液体). When water gets very cold, it freezes (结冰). It becomes a solid (固体). Solid water is called ice. Some of the Earth's water is invisible (看不见的). It is in the air. This kind of water is a gas. People, plants and animals need water to live. It is important to take care of the Earth's water. Polluted water will make people, plants and animals sick.
1．All of water we see is a liquid.2．Ice is the solid water.
3．When water gets very cold, it becomes a liquid.
4．The underlined word "gas"means "气体" in Chinese.
5．People can't live without water, but plants and animals can.
6．If people drink polluted water, they will be sick.
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
