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Luoshan is preparing (准备) for creating a national civilized city (创建全国文明城市). What can we do for our city?
We must obey (遵守) the traffic rules. Slow down and stop at the yellow light. Stop and wait at the red light. Go at the green light. We mustn’ t play when we cross the road. We mustn’ t touch the door when we take the bus or subway. We must keep to the right when we are walking on the road. We should be polite. We should talk quietly when we are in the library.
We must wear a helmet when we drive the electric bicycle (电动自行车) or motorbike (摩托车).
We shouldn’ t litter or spit (随地乱扔垃圾，随地吐痰). We must keep our classroom, our school, our city and other places clean.
1．We must slow down and2．We must stop and
3．We should
4．We must keep our city
5．What can you do for Luoshan?
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
