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There are three traffic lights: red, yellow and green. Red means “stop”. Yellow means “wait”. Green means “go”. In China, drivers drive on the right side of the road. In England, drivers drive on the left side of the road. If you go there by car, by bike or on foot, you must know the traffic rules.
1．The traffic lights are red, green and yellow. （______）2．Yellow is stop. （______）
3．Green is wait. （______）
4．In China, drivers drive on the left side of the road. （______）
5．In England, drivers drive on the right side of the road, too. （______）
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
