搜索
1．When will they arrive in Beijing?
| A．On June 15th. | B．On July 15th. | C．On July 25th. |
| A．The taxi drivers. | B．The policemen. | C．The tour guides. |
| A．21, 000, 000. | B．Less than 21, 000, 000. | C．More than 21, 000, 000. |
| A．Friendly. | B．Relaxed. | C．Honest. |
| A．The Great Wall. | B．The Summer Palace. | C．The National Museum of China. |
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
