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Space is very very big. The moon, the earth and the sun are all in space. The moon goes around the earth and the earth goes around the sun. People live on the earth. But people can’t live on the sun because it is too hot on the sun. Now people can go to the moon in a spaceship. Now there are three Chinese astronauts in space. They went to space on November 29th. They will work in space for 6 months. They will go back to the earth in May 2023. Do you want to be an astronaut? Please study hard!
1．The moon, the earth and the sun are all in space.2．The earth goes around the moon.
3．People can’t live on the moon because it is too hot.
4．Now there are three Chinese astronauts in space.
5．The three Chinese astronauts will go back to the earth in April 2023.
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
