第10题: [单项选择]Passage Two Questions 30 to 32 are based on the passage you have just heard. A. To transport water to higher place. B. To transport vegetables quickly. C. To bring nutrients to the soil. D. To adjust tile soil temperature. 参考答案:D 答案解析:[听力原文] Why have the engineers used pipes in Hawaii
第24题: [单项选择]甲、乙两地相距96千米,P,Q两辆车同时从甲地出发匀速驶往乙地.开车1小时后,户车在Q车前方12千米处.P车比Q车早40分钟到达乙地,P车的行车速度是( )千米/小时. A. 12 B. 24 C. 36 D. 48 E. (E) A、B、C、D都不正确 参考答案:D 答案解析:[解析] 设P车行车速度为v千米/小时,Q车1小时比P车慢12千米,Q车速度为(v-12)千米/小时.从甲地到乙地,P车需[*]小时,Q车需[*]小时,因此 [*] 即P车速度为