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Traffic (交通) rules are very important for us. As students, we must follow (遵守) the traffic rules. We always go to school from Monday to Friday. Don’t go to school by bike before 12 years old. Don’t walk in the middle of the street. Stop when (当......时候) the light is red. We should look left and right when we are crossing the roads. When we go to school by buses, we should wait in line and follow the rule “First get off, then get on”. My dear classmates, let’s follow the traffic rules together and be a good student.
1．Traffic rules are very important.2．We can go to school by bike everyday.
3．Stop when the light is red.
4．We can walk in the middle of the street.
5．We should stand in line, when we go to school by bus.
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
