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Jim wants to borrow (借) a book from the school library. He comes to the library with Jack. They can't see any assistants in it, but can only see some robots standing there. Then Jim says to one of the robots, “Hey, give me the book.” But the robot doesn't work. Then Jack tells him, “You should say ‘please’ first when you want to borrow something from him.” So Jim does. The robot brings the book to Jim. But this time Jim can't take the book out of the robot's hand. Jack tells him again, “You must say ‘Thank you’ before you take the book.” So Jim says, “Oh, thank you very much, Mr Robot.”
1．Jim wants to borrow a book from the school library.2．Jim comes to the library with his sister.
3．There are many assistants in the library.
4．You must say “please” first when you want to borrow the books from the robots.
5．Jack helps Jim and gives the book to him.
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
