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I am a student. I like reading a book. Every week, I go to Xinhua bookstore. I often go by bus, but sometimes I go by bike. I know the traffic lights are the same in every country. Red means stop. Yellow means wait and green means go. But some traffic rules are different in some country. We should remember the traffic rules.
1．Every week I go to the park.2．I often go to Xinhua bookstore by bus.
3．Traffic lights are the same in every country.
4．Traffic rules are the same in every country.
5．We shouldn’t remember the traffic rules.
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
