题目内容
-![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/201310201207171164009988/SYS201310201207171164009000_ST/0.png)
A.
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/201310201207171164009988/SYS201310201207171164009000_ST/1.png)
B.
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/201310201207171164009988/SYS201310201207171164009000_ST/2.png)
C.
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/201310201207171164009988/SYS201310201207171164009000_ST/3.png)
D.
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/201310201207171164009988/SYS201310201207171164009000_ST/4.png)
【答案】分析:根据倒数和绝对值的定义可知,-
的倒数为-
,|-
|=
.
解答:解:-
的倒数为-
,|-
|=
.
故选C.
点评:此题关键是倒数和绝对值的定义.
倒数的定义:两个实数的乘积是1,则这两个数互为倒数.
绝对值规律总结:一个正数的绝对值是它本身;一个负数的绝对值是它的相反数;0的绝对值是0.
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/201310201207171164009988/SYS201310201207171164009000_DA/0.png)
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/201310201207171164009988/SYS201310201207171164009000_DA/1.png)
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/201310201207171164009988/SYS201310201207171164009000_DA/2.png)
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/201310201207171164009988/SYS201310201207171164009000_DA/3.png)
解答:解:-
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/201310201207171164009988/SYS201310201207171164009000_DA/4.png)
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/201310201207171164009988/SYS201310201207171164009000_DA/5.png)
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/201310201207171164009988/SYS201310201207171164009000_DA/6.png)
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/201310201207171164009988/SYS201310201207171164009000_DA/7.png)
故选C.
点评:此题关键是倒数和绝对值的定义.
倒数的定义:两个实数的乘积是1,则这两个数互为倒数.
绝对值规律总结:一个正数的绝对值是它本身;一个负数的绝对值是它的相反数;0的绝对值是0.
![](http://thumb.zyjl.cn/images/loading.gif)
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