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| A. What about a football? B. How are you? C. Thank you for your help! D. Will you help me? E. But what kind of kite? |
Darning: I’m fine, thank you. I want to buy a present for my cousin. 2.
Sam: Of course I will. 3.
Darning: He’s got a new football.
Sam: How about a kite?
Darning: That’s a good idea! 4.
Sam: A Chinese dragon kite. I think he will love it.
Darning: That’s great. 5.
Sam: You’re welcome!
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
