题目

If the teachers want to buy _____, it will take the university much money. A. such good equipment     B. such good equipments C. so good equipment       D. so good an equipment 答案：A 解析: 略甲、乙两位学生参加数学竞赛培训．现分别从他们在培训期间参加的若干次预赛成绩中随机抽取6次，记录如下：甲8381797897 92乙9096797580 90（Ⅰ）用茎叶图表示这两组数据，并写出乙组数据的中位数；（Ⅱ）现要从中选派一人参加数学竞赛，你认为选派哪位学生参加合适？请说明理由．