Concentrate all your thoughts upon the work at hand. The sun's rays do not burn until brought to a focus - Alexander Graham Bell, Inventor
| 觸屏站| 加入收藏 | 版權申明 | 給我留言 | 聯系我們 | 幫助中心 |
友情鏈接:21世紀教育網  組卷網  課堂無憂  二一排課  學校招聘  組網題庫
http://www.vxiaotou.com