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This is a park. The park is different now. There weren't any trees or flowers here before. But now there are a lot of green trees and beautiful flowers here. There wasn't a slide here before. Now there are two slides here. One is long and the other is short. There weren't any people here before. Now there are many people here. They are playing and talking. I love this park now.
( ) 1. This is a zoo.
( ) 2. There are many trees and flowers in the park now.
( ) 3. There was a slide before.
( ) 4. People are washing clothes in the park.
( ) 5. I love this park now.
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
