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B: It’s a picture. I’s a park in Yunnan.
A: Cool! Are there any rivers?
B: 2． But there are two lakes. A big one and a small one.
A: That’s interesting. 3．
B: Yes, there are. The water in the lakes is very clean and cool. You can see the fish and water plants from your boat.
A: Are there many boats on the lakes?
B: 4．
A: Let’s go boating next time!
B: 5．
| A．No, there aren’t |
| B．What’s in your hand? |
| C．Good idea. |
| D．Yes, there are. |
| E．Are there any fish in the lakes? |
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
