A. Jenny gave him a model of a spaceship. B. Jenny gave him a picture of a spaceship. C. Jenny gave him a toy.
A. She's from Russia. B. She's from the US. C. She's from China.
A. He learnt a lot about flying a kite. B. He learnt a lot about using chopsticks. C. He learnt a lot about space travel.
A. No, he didn't. B. Yes, he did. C. Yes, he brought back some books about space travel.
A. No, he can't. B. Yes, he can. C. No, he can't. It's too big.

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

