搜索
The Moon
The moon is one of the natural satellites in the universe. When we see it from the earth at night, it is yellow. However, when we see it in space, it is gray. The moon is much smaller than the earth. The moon doesn’t shine. It reflects the light from the sun.
People first came to the moon in1969 in a spaceship called Apollo 11. They found that there was no water on the moon. After that, the moon was no more a mystery to people.
1．The moon is much2．The moon doesn’t
3．They found that there was no
4．People first
5．The moon
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
