问题 填空题
2a+3ab-2b
a-2ab-b
=
3
5
,则
1
a
-
1
b
的结果是
______.
答案

2a+3ab-2b
a-2ab-b
的分子与分母同除以ab,得出:

2
b
+3-
2
a
1
b
-2-
1
a
=
3
5
,化简得:
7
a
-
7
b
=21,

1
a
-
1
b
=3.

故答案为:3.

改错题

短文改错(共10小题;每小题1分,满分10分)

此题要求改正所给短文中的错误.对标题号的每一行做出判断:如无错误,在该行右边的横线上划(√);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。

Time is valuable but limit. There’s a famous saying,

“Time is money”, this shows the importance of time. When  小题1: 

time has gone, it will never  return back. It is a pity        小题2:  

when many people make poor u se of time. They spend their    小题3:    

precious time oversleeping, drinking and traveling. We don’t   小题4:    

realized wasting time equal to wasting part of their life.        小题5:

They always regret having made a little achievement so far.     小题6:     

Therefore, we should form the habit of value time. Do not      小题7: 

put off what can be done today until tomorrow. Lazy                小题8:   

will not only bring us failure, but also lead us on the road       小题9:      

of poverty and even death.                                   小题10:   

单项选择题