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I'm Andy. I visited the Summer Palace (颐和园) with my friends last Saturday. We went there by car. There were beautiful flowers and green trees. I took lots of photos there. Amy and Lucy played cards under a tree. Lingling sang songs on the grass. Sam and Daming played football on the grass. After that, we had a picnic along a clean river. What a good day we had!
1．They went there by car.2．Amy took lots of photos there.
3．Lingling sang songs under a tree.
4．Sam and Daming played basketball.
5．They had a good day.
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
