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Jim: Hello, Peter!
Peter: It was great fun.
Jim:
Peter: I went to Qingkou Town and visited my grandparents.
Jim:
Peter: No, it wasn’t. The river near my grandparents’ house was dirty.
Jim:
Peter: Rubbish. Rubbish made the streets messy and dirty too.
Jim:
Peter: I picked up the rubbish and put it in the bin. I put a sign beside the river.
Jim:
Peter: No littering. It told people not to throw rubbish into the river.
Jim: Well done.
| A．Was Qingkou Town clean? |
| B．What did you do there? |
| C．What made the river dirty? |
| D．How was your National Day holiday? |
| E．What sign did you put? |
| F．Where did you go? |
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
