The advantage of chevrons over straight，horizontal bars is that the former ___.
Acan keep drivers awake
Bcan cut road accidents in half
Cwill have a longer effect on drivers
Dwill look more attractive
相关试题
-
The advantage of chevrons over straight，horizontal bars is that the former ___.
-
seeing the painted bars. Chevrons，scientists say，not only give drivers the impression that they ar
-
An advantage of conventional lecturing over the use of audiovisual-based training is that ().
-
What does the author say about straight，horizontal bars painted across roads?
-
The main idea of the first paragraph is that ___.