多项式2b+14ab2-5ab-1是______次______项式．_爱下问搜题

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问题填空题

多项式2b+

1

4

ab2-5ab-1是______次______项式．

答案

多项式2b+

1

4

ab2-5ab-1是三次四项式．

故答案是：三，四．

改错题

短文改错。　　　
     此题要求改正所给短文中的错误。对标有题号的每一行作出判断：
     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（A），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，在该线在边横线上写出改正后的词。
     注意：原行没有错的不要改。

Growing up is not easy.Sometimes all that is need
is someone to rely on. For many years,she was Mum.
My mother was the career woman and her own
problems to take care∧,but when I needed her,she
was always there.Her strength came from anywhere
I don't quite know,somewhere very deep.She was so
strong that she would never break down,even while I
went to her with all my little-boy problems and shout
at her.Her strength made me stronger and gave to me
courage to try things other thought were impossible.A
helping hand is always stronger enough to lift you up.

1. _____
2. _____
3. _____
4. _____
5. _____

6. _____
7. _____
8. _____
9. _____
10. _____

填空题

氧化铝具有良好的（）和（），均采用气力输送。