题目

县化肥厂第一季度生产a吨化肥,以后每季度比上一季度增产,若平均增长率为x,则第三季度化肥增产的吨数为（     ） A、；    B、；      C、；      D、． 答案：A Nowadays more and more people are advised to arrange for insurance_____that they or their family members need medical treatment.        A. in order     B. in need       C. in case       D. in hope