搜索
This is our school library. It opens at 8:00 in the morning and closes at 5:30 in the afternoon. It isn’t very big. Only two librarians work there. We can find all kinds of books there. But few of them are in English.
When we borrow books, we must obey the library rules. There is a reading room in the library. It’s clean and bright. We can read magazines and newspapers there. But we can’t take any of them out.
1．The library closes at 8:00 in the afternoon.2．There aren’t any English books in the library.
3．We can’t take any books out of the library.
4．The reading room is clean and bright.
5．We should obey the library rules.
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
