The Great Wall of China is the longest wall in the world. It is about 6, 000 kilometers long, 7 meters high and 5 meters wide (宽). The Great Wall has a history (历史) of over 2,000 years. It was very difficult to build such a great wall without any modern (现代的) machines. Thousands of men died while they were building the wall.
Have you ever been to the Great Wall? It is very famous in the world. Many foreigners (外国人) come to visit it every year. They like it very much.
1.The longest wall in the world is the Great Wall of China.2.The Great Wall has a history of over 2,000 years.
3.There are no modern machines when the Great Wall was being built.
4.The Great Wall is famous in the world.
5.Most foreigners don’t like visiting the Great Wall.
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同类型试题
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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
![](http://static.xuejinqu.com/images/avatar.png)
![](http://static.xuejinqu.com/images/avatar.png)
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
![](http://static.xuejinqu.com/images/avatar.png)
![](http://static.xuejinqu.com/images/avatar.png)