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People enjoy sports all over the world. Sports are good for people’s healthy. Many people like to watch others play sports. | |
| They buy tickets or turn off their TV sets. People play | |
| different games in different season. They often play outside | |
| a room, but sometimes they play inside. We can finding | |
| sports here and there. Some sports are interested | |
| and people everywhere like it. Football, for example, | |
| is very popular that we can see | |
| much people in the world practice it. People from different | |
| countries can’t understand each other, but before a game | |
| they often become good friends. Do sports is also a good way to relax. We all can get a lot from sports. |
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
