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It is a lovely sunny day. Lily and her family are going to the park. There are many people on the street. Lily asks her dad. “Why do we stop?” Her dad answers, “Because (因为) the traffic light is red.” They wait for a minute. The light is green now. “Can we go now?” asks Lily. “Of course.” answers her dad. “You must be careful when you cross the street.”
1．Today is Sunday.2．Lily is going to the shop.
3．They stop because the light is red.
4．We must be careful when we cross the street.
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
