听一段对话,回答第1~3小题。
A. He’s a teacher. B. He’s a doctor. C. He’s a driver.
A. He’s a worker. B. He’s a doctor. C. He’s a policeman.
A. No, he doesn’t. B. Yes, he does. C. We don’t know.
听一段对话,回答第4~5小题。
A. No, she isn’t. B. Yes, she is. C. We don’t know.
A. Chinese. B. Maths. C. English.
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