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Library Rules * Don’t talk loudly in the library. * Don’t run or play in the library. * Don’t eat or drink in the library. * Don’t call (打电话) in the library. * Keep the book clean and re e turn (归还) it on time. * Put the books in order (有序) on the shelf. |
1．Amy is asking his friend a question loudly in the library.
2．Some students are eating bread and fruits in the library.
3．A boy is reading a book quietly.
4．Tom likes the library’s book very much and draws on it.
5．Some children are chatting (聊天) and laughing in the library.
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
