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Peter: Hi, Lucy.
Lucy: I’m going to pick up litter(垃圾) in the park in the morning.
Peter: Pick up litter?
Lucy: Yes.
Peter: That’s really helpful. You can make the park clean.
Lucy: To the farm.
Peter: How meaningful(有意义的) these activities are! Are you going only yourself?
Lucy: No.
Peter: OK. That’s convenient(交通便利的).
| A．It is one of the activities of our school. |
| B．Where are you going in the afternoon? |
| C．I am going with my classmates (同学). |
| D．I’m going to help farmers with farm work. |
| E．What are you going to do tomorrow? |
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
