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Shanghai changes a lot in transportation(交通).
In the past, there were few cars. Now there are many kinds of cars. There were not any bridges above the Huangpu River. Now there are some bridges on it. There were no tunnels(隧道)under it.
There were no undergrounds. Now there are many undergrounds. There were no light rails(轻轨)and maglevs(磁悬浮). Now there are some lights and maglevs.
The changes make our lives more convenient(方便). I like the changes.
1．The transportation in Shanghai changes a lot.2．There were many bridges on Huangpu River in the past.
3．Now there are some light rails and maglevs in Shanghai.
4．The changes in Shanghai are good for our lives.
5．I don't like the changes.
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
