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New York, London, Paris and other big cities are exciting places to live in. There are many interesting things to see and to do. You can go to different kinds of museums, plays and films. You can also buy things from all over the world. But there are serious problems(严重的问题) in big cities, too. It’s expensive to live there, and there are many people in big cities Every year many people move to the cities to find jobs, to study at good schools and receive good medical care. But sometimes these people cannot find work or good places to live in. Also it’s hard to keep the cities safe and clean.
Some people like living in big cities; others do not. Before they go to a big city, they should think about the problems of living there.
1．There are many interesting things to do in big cities.2．Everything is good in big cities.
3．All the people do not like to live in big cites.
4．You can find good jobs in a big city easily.
5．It is crowded(拥挤的) there because there are many people.
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
