Let's take a minute to think about the water we use. The human body is 60% water and we need to drink lots of water to be healthy. When we are thirsty we just go to the kitchen and fill a glass with clean water.
The truth is that we are lucky enough to have clean water whenever we want,but this is not the case for many people around the world.
A.We use water indirectly too. |
B.Every system in our body depends on water to function. |
C.It is to inspire people to learn more about water-related problems |
D.If children walk many hours a day to get water,they can't go to school. |
E.Did you know that around 750 million people do not have clean water to drink? |
F.In 1993 the United Nations decided that March 22nd is the World Day for Water. |
G.In this way,they know how it feels to walk a long distance carrying heavy bottles. |
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