1.某地区6,7,8月份平均降雨量是12,问去年6,7,8的降雨量是占次地区这一时期平均降雨量的%?
a. 去年6平均降雨量是以往6的12%
b. 去年7,8平均降雨量是以往此期间降雨量的50%
2.PS:一个公司127人,收入的median是350。
I 至少(at least)有64人的收入大于等于350.
II 至少有63人的收入小于等于350。
III至多(at most)有64人的收入大于等于350.
3.technicians equally receive defective products from a box containing 88 defective products, if the number of the rest of defective products in the box less 2 than the number of technicians, then
the following cannot be the number of technicians?
5 12 16 9 18作者: onlyangel 时间: 2003-1-9 15:11