For any two numbers $$x$$ and $$y$$, the special operation $$^{}\otimes$$ is defined as follow $$x^{}\otimes y=x+y-\frac {2012}{335}$$.  Calculate $$\frac {2^{}\otimes 4^{}\otimes 6^{}\otimes \cdots ^{}\otimes 2010^{}\otimes 2012}{2012}$$. 
选项为:A:$$1006$$  B:$$1005$$  C:$$503$$  D:$$502$$  E:None of the above  请回答其中一个选项.