A.





1.A: Look at my study, Li Yan.
B: Wow! There is a new computer on the desk.
A: Yes. There is a chair and a picture in it.
2.A: Wow! We have so many things for our picnic.
B: Would you like some juice, Lisa?
A: Thank you.
3.A: Hello, children. Do you like English?
B: Yes, I do.
A: What do you do in an English class?
B: We play and act.
4.A: Hello, everyone! Let’s help children in need.
B: How many bags do you have?
A: We have seventy bags.
5.A: Hi, Jim! This is Peter.
B: Hello, Peter!
A: Tomorrow is Sunday. Would you like to go swimming with me?
B: Good idea.

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

