问题 选择题

定义在R上的函数f(x)=ex+e-x+|x|,则满足f(2x-1)<f(3)的x的取值范围是[ ]

A.(-2,1)

B.[-2,1)

C.[-1,2)

D.(-1,2)

答案

答案:D

单项选择题
改错题

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:

此行多一个词: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。

此行缺一个词: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。

此行错一个词: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。

Dear Ms Smith,

I’m Li Hua from the Student Union of Yucai Middle School.     

小题1:..___________

We were organizing an art exhibition for high school students      

小题2:. ___________

in our city. It will be hold on the 9th of June in the Exhibition       

小题3:. ___________

Hall of Beihai. More than 1,000 painting will be on show,          

小题4:.. ___________

but high school students and teachers from all the five districts      

小题5:. ___________

will come to the event. As you are very popularly with us        

小题6:.. ___________

Chinese high school students, we’d like to invite for you          

小题7:. ___________

to the exhibition. We would be grateful when you could           

小题8:. ___________

join them that day.                                          

小题9:.. ___________

I am looking forward hearing from you soon.                 

小题10:. ___________                                  Yours,

Li Hua