Free Computer, Programming, Mathematics, Technical Books, Lecture Notes and Tutorials

Free Computer Books, Free Mathematics Books, Directory of online free computer, programming, engineering, mathematics, technical books, ebooks, lecture notes and tutorials. Very well categorized. Equipped with both pattern and keywords search engines....

頭要怎麼開燈？（點圖片看大圖）

請大家解惑！頭怎麼開燈？ ...

十大謊言 .....相信否

十大謊言 .....  相信否 ??...

這試卷太牛了，第一道題就這麼坑爹！！！！

這試卷太牛了，第一道題就這麼坑爹！！！！ ...

未經專業訓練請切勿模仿~~~

偶喜歡被夾在箱子裡, 未經專業訓練請切勿模仿~~~ ...