题目

They want to know how to deal with the ________ problems. There are too many cars, buses and bikes on the street in the rush hour.A. food B. noiseC. education D. traffic 答案：【答案】D【解析】句意：他们想知道怎样处理交通问题。在尖峰时刻，在街道上有许多汽车，公共汽车和自行车。A. food食物；B. noise噪音；C. education教育；D. traffic交通。根据下文There are too many cars, buses and bikes on the street in the rush hour.可知是说交通问题。根据题意，故选D。（2007•西藏）已知∠A=40°，则∠A的补角等于（ ）A．50°B．90°C．140°D．180°