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| Is that the bookstore? What do you want to buy? What are you going to buy? Where is it? How can we get to the bookstore? |
Alex: Let’s go to the bookstore together.
Tim: Sure.
Alex: It is near the park. It’s about five minute’s walk.
Tim:
Alex: I am going to buy some story books.
What about you?
Tim: I want to buy a new word book.
Alex: Oh, wait! Where are we now?
Tim: Don’t worry! I will ask. Excuse me.
Policeman: Turn left. Walk along Bird Street and then turn right at the postbox.
Alex &Tim: Oh, thank you so much.
Tim: Look!
Alex: Yes, it is.
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
