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It is Sunday today. The weather is fine. Bob and Jane are in the park. It is a big park. They can see many people there. They come here to play after a week's study. Some boys are playing chess on the grass. Some girls are singing and dancing. An old woman is reading a newspaper under a tall tree. A young man and his little son are playing with a toy car. How happy they are!
1．The weather is very good on Sunday.2．Bob and Jane go to the park to study.
3．A young woman and her little son are playing with a toy car.
4．Some boys are playing football on the grass.
5．All the people in the park are very happy.
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
