问题 单项选择题

已知等腰直角三角形的三边长分别为a、b、c,a、b为两条直角边。求的值()

A.1006000

B.503000

C.2012

D.20120

答案

参考答案:C

解析:

因为a、b、c是等腰直角三角形的三边长,且a、b为两条直角边,所以a=b,且c2=a2+b2=2a2,则原式=[*]

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做出判断:如无错误,在该行右边横线上画一个勾(√);如有错误(每一行只有一个错误),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:在缺渊处加一个漏字符号(A);在该行右边横线上写出该加的词.此行错一个词:在错的词下面划一横线,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.

I've really got to do something to lose weight because

I'm getting much too fat.1 wasn't worried about it until I

go                                                    1.___________

to see the doctor. He told me that I'd probably had a heart

                                                          2.___________

attack while started eating less. When you're on a diet you

                                                           3.____________

have to stop eat too much even though you are always

hungry.                                               4.___________

They may be very hard to do and you certainly need a lot

                                                           5.___________

of will-power to succeed. So I would stay on a health farm

for a                                                    6.___________

month l won't be able to eat much and so I'll have to stick

                                                             7.___________

to my diet. I'll also do plenty of exercise, which won't give

                                                             8.___________

me any harm too. Both the diet and the exercise will

                                                              9.__________

help me to lose weight and feel more better. 

                                                              10.___________

单项选择题