用记事本html编辑网页保存成THTML,打开后还是记事本,不是默认的浏览器,谁能详解一下??<html><head><title>Title of page</title></head><body>This is my first homepage. <b>This text is bold</b></body></html> 我明明保存的.HTML 但打开还是记事本啊