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| When you see a fire, If it is all smoky, Now you are outside. Quickly go outside. Cover your mouth and nose. You know what to do. But never use the lift. And crawl out very fast. Listen to the firemen. It is dangerous inside. Never stop for toys or clothes. Here they are to help you! |
2．We can use the lift because it’s so quickly.
3．If it is smoky, we mustn’t crawl as quickly as we can.
4．The toys or clothes, we should never stop for them.
5．When we are outside, we can listen to the fireman or not.
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
