问题 单项选择题

多项式x3+ax2+bx-6的两个因式是x-1和x-2,则其第三个一次因式为( ).

A.(A) x-6

B.(B) x-3

C.(C) x+1

D.(D) x+2

E.(E) x+3

答案

参考答案:B

解析:
[解] 设f(x)=x3+ax2+bx-6.
x3-6x2+11x-6=(x-1)(x-2)(x-3).故选(B).

改错题

第五部分写作(共两节,满分35分)

第一节:短文改错(共10小题;每小题1分,满分10分)

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。

As is known to all the world that                                                       81.__________

other large earthquake broke out in China, and                                    82.__________

that YuShu laid in ruins. The Chinese government                                         83.__________

took quick action to carry the first aid. Firemen,                                  84.__________

soldiers, doctors, and volunteers reached in the                                    85.__________

frontier in no time. The local people too conducted                                        86.__________

self rescue at once. China is a great country who                                           87.__________

people are strong, brave and uniting. They will                                            88.__________

never say “give up” and “give in”. So Chinese                                      89.__________   

are sure to beat the battle. Yushu will never fall down,                                90.____________

And Qinghai will be forever green !

单项选择题