搜题请搜索小程序“爱下问搜题”
问题 解答题

某区中学生足球联赛共赛8轮（即每队均需赛8场），胜一场得3分，平一场得1分，负一场得0分．在这次足球联赛中， * * 安队踢平的场数是所负场数的2倍，共得17分，试问该队胜了几场？

答案

设负的场数为x，则平的场数为2x，那么胜的场数为（8-x-2x），

3（8-x-2x）+2x=17，

解得x=1，

∴8-x-2x=5．

答：胜了5场．

单项选择题

不属于心理效果的事后测定方法的是（）

A.仪器测定法

B.认知测定法

C.视听率测定法

D.回忆测定法
查看答案
单项选择题

Dina Borzekowski made a study of a group of third-grade students from six American schools. During a school year, nearly 400 students and their parents were asked to report on whether they had such things as televisions and computers in the home, as well as how often the child used them. The children’s language ability was tested (测验) twice over the year. Children who had a television set in the bedroom but did not have a computer at home scored (得分) the lowest, while students without TV in the bedroom but with a computer at home scored the highest. Students who had a television in the bedroom over the school year scored lower than those who had their TV taken away during the same time.
"This study suggests that taking TV sets out of children’s bedrooms, or not putting them there, may be helpful," said Borzekowski. "While this study does not prove (证明) that bedroom TV was the reason for the lower test scores, it suggests that children shouldn’t have TV in their bedrooms. It also suggests that a home computer may help a child’s test scores. The best way was having both: no TV in the bedroom and also a home computer to use. \

Who scored the highest on school tests
[A] Children with bedroom TV and home computers.
[B] Children without bedroom TV or home computers.
[C] Childern without bedroom TV but with home computers.
查看答案