The advantage of chevrons over straight, horizontal bars is that the former （）

单项选择题According to the author, whether we ll go to a place or not depends on （）

A．media advertising
B．department store display window
C．word-of-mouth advertising
D．the business fame

单项选择题On roads painted with chevrons, drivers tend to feel that （）

A．they should avoid speed-related hazards
B．they are driving in the wrong lane
C．they should slow down their speed
D．they are coming near to the speed limit