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| A．playground | B．library | C．classroom | D．canteen | E．garden |
2.It is clean and tidy. There are many desks and chairs in it. There is a blackboard. There is a cupboard and a bookshelf too. The students have lessons there. It is a
3.It is in front of the playground. There are many flowers and plants in it. It is beautiful.It is the school
4.Look! It is a very big room. There are a lot of books in it. The students can read books in it. It is the
5.It is big. We can see some slides, swings and seesaws there. The children can play foot-ball there, too. It's a
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
