问题 选择题
在代数式-2bc,3x2-2x,-πx2y,
1
a
,-3.4,m中,单项式的个数是(  )
A.2个B.3个C.4个D.5个
答案

在代数式-2bc,3x2-2x,-πx2y,

1
a
,-3.4,m中,

单项式有-2bc,-πx2y,-3.4,m,单项式的个数是4个.

故选:C.

改错题

短文改错(共10小题;每小题1.5分,满分15分 )

此题要求对一段文章改错。先对每一行做出判断是对还是错。如果是对的,在该行右边横线上画一个勾(√);如果有错误(每行不会多于一个错误 ),则按情况改错如下:

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。

Most Americans would find it hard to think that what life   小题1:____________

would look like without a car. But, some have realized    小题2: _______ ____

the serious question of the pollution caused by the car.  小题3: ____ ________

The polluted air becomes harmful and dangerous to health.  小题4: ___ ________

One way to getting rid of the polluted air is to build a   小题5:____________

car that doesn’t cause pollution. That is how several of the  小题6: ____  ______

large car factories have been tried to do. But to build       小题7: _________   

a clean car is more easier said than done. Progress in this   小题8:_________   

field has been slow.

Another way is to take place of the car engine by a     小题9: ___________ 

steam one. Inventors are now working on steam cars as well as

electric cars. Many makers believe that it will spend         小题10: __________  

years to develop a practical model that pleased people.

单项选择题 B型题