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A: Hi, Nancy. What are you going to do this May Day?
B:
A: It’s wonderful. What about you, Helen?
B:
A: Sounds great.
B: On foot. He works on a ship.
A:
B: Yes, I did. Last week, I helped him pick up some rubbish on the beach (沙滩).
A: Great!
B: Sure. Let’s protect the Earth together!
| A．I’m going to visit my uncle. |
| B．How does he usually go to work? |
| C．Did you visit him before? |
| D．I’m going to do some cleaning with my mother. |
| E．It is good for the environment. |
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
