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| A. How many students are there in your class? B. Yes. I often call them. C. May I ask you some questions? D. Yes. It’s beautiful, and the people here are very nice. E. Some are from France and Russia, and the other students are from China. |
(D=Dongdong, T=Tom)
D:
T: Certainly.
D:
T: There are forty. There are twenty-one boys and nineteen girls.
D: Where are they from?
D:
D: Do you have their numbers?
T:
D: Do you like our city?
T:
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
