问题 解答题

解不等式:|x|<2x2-1.

答案

由原不等式得:

x<2x2-1
x>-2x2+1

即 

2x2-x-1>0
2x2+x-1>0

解得:

-
1
2
>x或x>1
x<-1,或x>
1
2

即:-1>x或x>1.

∴原不等式的解集为{x|x<-1或x>1}

改错题

第二节短文改错 (共10小题;每小题1.5分,满分15分)

此题要求改正所给短文中的错误。对标有题号的每一行做出判断∶

如无错误,在该行右边横线上画一个勾(√);如有错误(每行只有一个错误), 则按下列情况改正∶

该行多一个词∶把多余的词用斜线(\)划掉, 在该行右边横线上写出该词,并也用斜线划掉。

该行缺一个词∶在缺词处加一个漏字符号(∧),在该行右边横线上写出该加的词。

该行错一个词∶在错的词下划一横线,在该行右边横线上写出改正后的词。

注意∶原行没有错的不要改。

Get a good education is more important today than                 76. __________

ever before. In Canada mostly children attend public                 77. __________

schools. Public schools are mainly found by governments             78. ________

through tax income. Students in Canada taught in                    79. _________

English and in French. The rests of Canadian children          80._______

attend private schools, that are supported mainly by fees      81._______

paying by parents. By law, the children must attend                 82._____

the school from age 5 to 16. There are several different               83. ________

levels in the Canadian education system .The first was                    84._____

called Elementary Schools, which include kindergartens                     85.________

through grade 7 or 8.

单项选择题