只选用以下功能就可以完成测试和学习的功能了

[img]http://dl.iteye.com/upload/picture/pic/128175/0263609b-338b-3bc4-866d-855eb3421a2a.png[/img]

[img]http://dl.iteye.com/upload/picture/pic/128177/a0b7e790-2476-32c8-bdfa-4996fea1d309.png[/img]

[img]http://dl.iteye.com/upload/picture/pic/128179/add39065-84ee-33ce-a801-aeb77ec23b52.png[/img]

[img]http://dl.iteye.com/upload/picture/pic/128181/b9119980-7b14-3ec6-9e5e-b6f495adb7ac.png[/img]

[img]http://dl.iteye.com/upload/picture/pic/128183/1e82a525-2870-37d8-a568-d8ad81551a88.png[/img]