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Amy: Hi, Lily!
Lily: My family are having a field trip.
Amy: Cool! What is your father doing?
Lily:
Amy:
Lily: She is reading a book about animals. And there is a clean river here. We can go fishing.
Amy: That sounds great.
Lily: Yes. I am having fun here.
Amy: No, thanks.
Lily: OK!
| A．He is taking pictures of the flowers. |
| B．What about your mother? |
| C．I have to do my homework now. |
| D．Do you want to come and play with me? |
| E．What are you doing? |
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
