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Mike: Good morning, Lucy.
Lucy:
Mike: Really? Can I see it?
Lucy: OK!
Mike: Wow! It’s a panda. I like it.
Lucy: My schoolbag is heavy.
Mike:
Lucy: Look! A pencil box and many books.
Mike:
Lucy: One, two, three… Oh, too many.
| A．Here you are. |
| B．Good morning, Mike. |
| C．What’s in it? |
| D．I have a new schoolbag. |
| E．How many books do you have? |
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
