不一定的,你参照一下这里的吧:http://www.baidu.com/s?ie=gb2312&bs=%B6%FE%C2%C8%BC%D7%CD%E9%D0%D4%D6%CA&sr=&z=&cl=3&f=8&wd=%B6%FE%C2%C8%BC%D7%CD%E9%CA%B9%D3%C3%C6%DA%CF%DE&ct=0