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Lucy: Look, Kate. There is a baby dog. It’s lovely.
Kate:
Lucy: It’s sleeping.
Kate: That is the mother dog.
Lucy: What is she doing?
Kate:
Lucy: Yes, and I can see a monkey. Can you see it?
Kate:
Lucy: What is it doing?
Kate:
Lucy: Look! There are many fish in the river. What are they doing?
Kate:
| A．It’s eating a banana. |
| B．What is it doing? |
| C．Yes, it’s in the tree. |
| D．They’re swimming. |
| E．She is looking at the baby dog. |
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
