第7题: [单项选择]甲、乙两车都从A地出发经过B地驶往C地,A、B两地的距离等于B、C两地的距离,乙车的速度是甲车速度的80%。已知乙车比甲车早出发11分钟,但在B地停留了7分钟,甲车则不停地驶往C地,最后乙车比甲车迟4分钟到C地。那么乙车出发后多少分钟时,甲车就超过乙车( ) A. 18分钟 B. 20分钟 C. 27分钟 D. 32分钟 参考答案:C 答案解析:[解析] 乙车的速度是甲车速度的80%,v甲:v乙=5:4,所以t甲:t乙=4:5,根据A、B两地的距离等于B、
第23题: [单项选择]What was the result of Columbus’ two trips to America A. They led to the discovery of America. B. They made native American foods popular. C. They brought great wealth to Spain. D. They made native American life styles well-known. 参考答案:B