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Amy: Who are they, Ling ling?
Ling ling:
Amy:
Ling ling: It’s my grandma. She was a dancer. She danced in lots of Chinese cities.
Amy:
Lingling: Yes, She learnt English.
Amy: Is this your grandpa?
Lingling:
Amy: Did he learn English too?
Lingling:
| A．Did she learn any foreign languages? |
| B．Yes, it is. |
| C．No, he didn’t. |
| D．They’re my grandparents. |
| E．Who’s this? |
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
