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The moon is wonderful and famous in our daily life. There are many songs, poems and stories about the moon. Have you ever dreamed of going to the moon? Maybe you or your children will take a trip to the moon in the future. What will you see there? What will you do there? How will you feel there? It is cold and dark on the moon. People can’t see any light. The moon only reflects(反射) the light of the sun. It may be interesting to visit the moon. We can take pictures and study the rocks(岩石) there. But we can’t live on the moon now because there is no air, water or light
1．People write songs, poems and stories about the moon.2．We can’t live on the moon because there is no air and trees.
3．There are rivers and rocks on the moon.
4．The sun reflects the light of the moon.
5．Visiting the moon may be interesting.
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
