1? , black triangle with yellow background, the answer is preferred; The traffic signs on the yellow background and the black triangle are warning signs, and the answer is the first choice: pay attention to xxx.
2. A white picture with a blue background is an indication, so don't confuse it with a warning; In fact, most signs with white characters on a blue background can be distinguished, that is, the patterns of many indication signs are very similar to warning signs, so we must distinguish them. The yellow background on the left warns pedestrians; The blue background on the right is a crosswalk. The same indicators are easily confused.
3. The red sign is forbidden, and the answer must be forbidden; Just like the reason that the red light is forbidden to pass, the red background sign indicates that xxx is forbidden.
4, the green background marks high speed, just look at the picture and read the book; When you see the green background sign, you will think it is a high-speed sign. Generally speaking, it can be easily done by looking at pictures and words. The fence is guarded, but the locomotive is unguarded; Pay attention to the livestock to see the old cow, the wild animal is a flying deer; Don't be dazzled by the speed sign. Red, high, blue and low gray will be removed.
The maximum speed limit in red and the minimum speed limit in blue are easy to understand, and the gray speed limit sign indicates the lifting of the speed limit, which often bothers inexperienced students.
Generally, it is used as the background color of signs such as "stop and give way" and "no entry", the red circle and diagonal line of no entry signs, the arrows in signs such as "make way for passing vehicles" and "pass vehicles first", and the "first aid station" in position identification signs uses the red cross; The background color of national highway number signs and railway fork symbols.