第13题: [单项选择]A school district has 1,989 computers,which is approximately one computer for every 68.6 students.Of the following,which is the closest approximation,in thousands,of the number of students in the sch001 district A. 30 B. 120 C. 140 D. 160 E. 200 参考答案:C 答案解析:一校区有1989台计算机,大约为68.6名学生一台,以千为单位,下面哪一项最接近校区的学生数 此题比较简单,大多数的考生都会这样来解这道题:由平均68.6人一台电脑可得该校区共有198