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This is the school library. It opens(开门) from 8:30 to 11:30 in the morning and from 2:30 to 4:30 in the afternoon.
The school library isn’t very big. Only three librarians work there. In the library students can find all kinds(种类) of books.
Students must obey(必须遵守) the library rules. They can borrow only two books at one time(一次) and keep(保存) the two books for two weeks. There is a reading room(阅览室) in the library. It’s bright(明亮的) and clean. Students can read books there, but they can’t take books out of the reading room.
1．The school library opens from 2:30 to 5:30 in the afternoon.2．Only three librarians work in the school library.
3．Students can borrow only a book at one time.
4．There is a reading room in the library.
5．Students can take books out of the reading room.
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
