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Sally: Hi! Bob.
Bob: Yes. I have one cousin.
Sally:
Bob: She is nine years old.
Sally: I have one cousin, too. He’s only seven.
Bob: Wow, so cool!
But I can’t swim very fast.
Sally: Would you like to go swimming with us this Sunday?
Bob: Yes, I’d like to. That’s great.
| A．I like swimming too. |
| B．How old is she? |
| C．But he can swim fast. |
| D．Do you have any cousins? |
| E．What about you? |
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
