What steps will reproduce the problem?
1.
2.
3.微分法
What is the expected output? What do you see instead?
What version of the product are you using? On what operating system?
Please provide any additional information below.
Original issue reported on code.google.com by donny0...@gmail.com on 12 Jul 2013 at 7:23
Original issue reported on code.google.com by
donny0...@gmail.com
on 12 Jul 2013 at 7:23Attachments: