听下面一段对话,回答第1~3小题。
A. He played football.
B. He helped his mother wash clothes.
C. He played computer games.
A. Yes, he does. B. No, he doesn't. C. We don't know.
A. He is a bad boy. B. He is a good boy. C. He is so clever.
听下面一段对话,回答第4~5小题。
A. Yes, he did. B. No, he didn't. C. We don't know.
A. Because his bike was broken.
B. Because he got up late.
C. Because the traffic was busy.
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