A. He is having a picnic near the school. B. He is having a picnic in the park. C. He is flying a kite in the park.
A. They're swimming on the pond. B. They're swimming in the lake. C. They're eating sandwiches.
A. He is Jack's friend. B. He is Jack's elder brother. C. He is Jack's little brother.
A. He is drinking a cola. B. He is drinking milk. C. He is drinking juice.
A. Yes, he is. B. No, he isn't. C. We don't know.

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

