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China made its first stamps in 1878. The first stamps were of a very big dragon. Behind the dragon, there were clouds and waves.
People all over the world love to collect stamps from China. Chinese stamps are famous because they are very beautiful. They also show China's history, people, places and animals. Many stamps are the children's paintings. People love these stamps. The paintings are very good.
1．The first stamps of China were made in 1878. （2．There is a big tiger on the first stamps. （
3．People all over the world like collecting Chinese stamps. （
4．The Chinese stamps show China's history and culture(中国的历史和文化). （
5．The paintings on the stamps are very beautiful. （
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
