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It was sunny yesterday. Jack and his classmates went to the Science Museum together. They saw many pictures of planets (行星). The pictures are were very interesting. They also saw some photos of astronauts (宇航员). Armstrong is the first man on the moon. He is from the US. Yang Liwei is China’s first man in space.
There were some models of spaceships in the museum. The boys were all interested in them. They made a model of a spaceship by themselves. Jack said he wanted to be an astronaut in the future.
1．Yesterday was sunny.2．Jack and his classmates went to the History Museum.
3．There are many pictures of planets in the museum.
4．Armstrong is China’s first man in space.
5．Jack didn’t want to be an astronaut in the future.
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
