很精彩的20张图，很简单易懂的说明了问题，赞！ [img]http://bbs.c114.net/attachments/month_1201/20120105_81001b3653fecf7dcceeQgnfNeG9sbcJ.png[/img] [img]http://bbs.c114.net/attachments/month_1201/20120105_6859029a6923ab79697fGmQLxMJrKo7V.png[/img] [img]http://bbs.c114.net/attachments/month_1201/20120105_483f5b1789395ba9b81bmO8pcJUn5pnj.png[/img] [img]http://bbs.c114.net/attachments/month_1201/20120105_ef1cf09150f97e1f2985H2qA4A39p1qm.png[/img] [img]http://bbs.c114.net/attachments/month_1201/20120105_21a627f93c90f13e8d58Iv2ObVnlIwFO.png[/img] [img]http://bbs.c114.net/attachments/month_1201/20120105_eaddaad5ffb0394d276fbIIu3BhaprUF.png[/img] [img]http://bbs.c114.net/attachments/month_1201/20120105_59f23f04018b309fe561W4XkBYtvLmsx.png[/img] [img]http://bbs.c114.net/attachments/month_1201/20120105_09265fbe553296b84abdYS0e5oN9zi5C.png[/img] [img]http://bbs.c114.net/attachments/month_1201/20120105_8492b86d7dd86fbbe039MdEzenHWaiEd.png[/img] [img]http://bbs.c114.net/attachments/month_1201/20120105_47bd65286338d29e6476smjSTnKgRmRW.png[/img] [img]http://bbs.c114.net/attachments/month_1201/20120105_a64bc573e37124f59444eFyYdnVQqOQw.png[/img] [img]http://bbs.c114.net/attachments/month_1201/20120105_0bf12cde4962e5ebd258jbVql4SZWLG1.png[/img] [img]http://bbs.c114.net/attachments/month_1201/20120105_b3bb5dbedbdbb4568fb63r3seu7EPzvY.png[/img] [img]http://bbs.c114.net/attachments/month_1201/20120105_4497da0b5a43627e5517iUiWxVrniG55.png[/img] [img]http://bbs.c114.net/attachments/month_1201/20120105_31f28b3d6c94abdf489bfwKokCidFvDi.png[/img] [img]http://bbs.c114.net/attachments/month_1201/20120105_d8bfe9de3222e97052694HQRxljhLu18.png[/img] [img]http://bbs.c114.net/attachments/month_1201/20120105_607260c7c92e619baafaSXCHnW0sFraR.png[/img] [img]http://bbs.c114.net/attachments/month_1201/20120105_5f965fa6f67d11e569eeugeFmWZwDFxO.png[/img] [img]http://bbs.c114.net/attachments/month_1201/20120105_eb53d00089fc2841dd18JlzSY0MHD8GL.png[/img] (责任编辑：admin)