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Today let me tell you something about astronauts. The first man on the moon was an American. He walked on the moon on July 20th, 1969. The first man into space was from USSR. Yang Liwei was the first Chinese astronaut in space. He went there on October 15th, 2003. Liu Yang was the first Chinese woman astronaut. Now there are three Chinese astronauts in space. They are going to be there for 6 months. They are going to have Chinese New Year’s Day in space. How great astronauts are!
1．An American walked on the moon on July 20th, 1969.2．The first man into space was from the USA, too.
3．Yang Liwei went into space on August 15th, 2003.
4．Liu Yang was the first Chinese woman astronaut.
5．The three Chinese astronaut are going to have Chinese New Year’s Day in space.
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
