摘要：
There is an objective test result such as ``OOXXOXXOOO". An `O' means a correct answer of a problem and an `X' means a wrong answer. The score of ea... 阅读全文
摘要：
这个题，走了不少弯路，做了之上2个小时，究其原因，化学功底不深厚啊。。。。。CH3这样的我还以为是（CH）3，结果。。。。。。 后来略参考了网上的代码。。 An organic compound is any member of a large class of chemical com... 阅读全文