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There are two pictures about our city. Look! There was a small park many years ago, but now there is a big and beautiful park. And in the park, there is a lake with some ducks on it. There wasn’t a lake in the past. In our city there were many old houses and small trees. But now there are many new tall buildings. The trees are very tall now. There are many supermarkets and cars now. I love my city.
1．There was a big park in our city in the past.2．There is a lake in the park.
3．There are many new tall buildings in our city now.
4．The trees are not very tall.
5．There are many cars in the city.
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
