500)this.width=500}" alt="" src="http://www.itfensi.com/d/file/exam/IT/second/2008-04-05/e4b4427797ad2c23c016ae83a2fceca1.gif">
[图一]

500)this.width=500}" alt="" src="http://www.itfensi.com/d/file/exam/IT/second/2008-04-05/90ddbde77a21cb6bf06ffe09427797d7.gif">
[图二]

  500)this.width=500}" alt="" src="http://www.itfensi.com/d/file/exam/IT/second/2008-04-05/779b6aa54f19114b7eadf3eec46510e6.gif">
[图三]

500)this.width=500}" alt="" src="http://www.itfensi.com/d/file/exam/IT/second/2008-04-05/a90d12455a01dab5bdfde544c504bd0c.gif">
[图四]