问题 单项选择题

把多项式x3-4x分解因式所得的结果是()。

A.x(x2-4)

B.x(x+4)(x-4)

C.x(x+2)(x-2)

D.(x+2)(x-2)

答案

参考答案:C

解析:

x3-4x-x(x2-4)=x(x-2)(x+2)。

解答题
翻译题

Translate the following sentences. (翻译下列句子)

1. 你有多高?

                                                                     

2. 你比我矮。

                                                                    

3. 你怎么了?

                                                                    

4. 你今天看起来不太高兴。

                                                             ___

5. 你周末经常去干什么?

                                                              ___

6. 他上周末干什么了?

                                                                    

7. 你怎么去的那儿?

                                                                   

8. My room is 15 square meters.

                                                                __

9. How do you feel if you have a flu?

                                                                __

10. My mother is going to buy me a new skirt.

                                                  _________