搜索
M1． people like to travel by p2．, because it is fast. But I don’t like it because an airport (机场) is usually far f3． the city. You have to g4． there early and wait f5． hours for the plane to take off (起飞) and it is often late. You can’t open the window. You can’t choose the food. Planes a6． fast, but they still take hours to get out of the airport and into the city. I l7． traveling by train. I think trains are safe (安全的). Railway stations are usually in cities. When you are l8． for a train, you can catch another one. You can walk around in the train and open the windows. You c9． see many interesting things on your way. I know it takes (花费) a little more t10．.
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
