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Jack: Hello, Zhang Peng.
Zhang Peng: It’s on October 2nd.
Jack:
Zhang Peng: I often have a birthday party with my classmates.
Jack:
Zhang Peng: Yes, we do. When is your birthday?
Jack: It’s in winter. It’s on December 9th.
Zhang Peng: I like winter best.
Jack: Why?
Zhang Peng:
| A．Because I can make a snowman. |
| B．When is your birthday? |
| C．What do you often do on your birthday? |
| D．Do you eat a birthday cake? |
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
