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Mike: Hi, Helen. This is my study（书房）.
Helen: How nice! What’s this?
Mike: It’s a pencil case.
Helen: Is that a crayon in the pencil case?
Mike: No, it isn’t. It’s a pencil.
Helen: Is that a rubber in the desk?
Mike: Yes, it is.
Helen: Can I have a look?
Mike: Sure. Here you are.
1．This is Helen’s study.
2．The study is nice.
3．The pencil is in the pencil case.
4．The rubber is on the desk.
5．Helen wants to look at Mike’s rubber.
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
