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Mike:
Ben: I often play computer games.
Mike:
Ben: Yes, I am.
Mike:
Ben: I can wash the clothes and sweep the floor.
Mike: Great! You’re helpful!
Ben:
Mike: I often go to the nature park.
Ben: Really? It’s cool! Is there a lake in the park?
Mike: Yes. And there are many flowers near the lake.
Ben:
Mike: No, there are no bridges. But there are some boats on the lake.
| A．What about you? |
| B．What do you often do on Saturdays and Sundays? |
| C．What can you do? |
| D．Are there any bridges over the lake? |
| E．Are you helpful at home? |
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
