听下面一段对话,回答第1~2小题。
A. They are in London. B. They are in New York. C. They are in Nanjing.
A. It's green. B. It's yellow. C. It's red.
听下面一篇短文,回答第3~5小题。
A. Wear a seat belt. B. Wait in line. C. Drink some water.
A. First get off, then get on. B. Run quickly. C. First get on, then get off.
A. Run quickly. B. Look left and right. C. Look for cars.
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