精选优质文档-倾情为你奉上2012二问题解决型论说文常用句型 引出话题的常用句式1. Nowadays, has become a problem we have to face. 如今已经成为我们必须面对的问题。2. Nowadays, more and more people are concerned about the problem of现在越来越多的人开始关注的问题。3. Although. . . has brought convenience to us, many people have begun to realize that it is the source of trouble as well. 尽管给我们带来了很多便利，但是很多人已经认识到它也会制造麻烦。4. Recently, the rise in the phenomenon of. . . has drawn arousedcaptured worldwide attention. 最近现象的日益增多已经引起了全世界的注意
