A. Yes, he is. B. No, he isn't. C. No, he is going to get up at 6:30.
A. At 7:30. B. At 8:30. C. At 7: 00.
A. They're swimming. B. They're eating sandwiches. C. They're eating hamburgers.
A. It's 11:30. B. It's 12:30. C. It's 11:00.
A. They're going to eat hot dogs. B. They're going to eat hamburgers. C. They're going to eat sandwiches.

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

