——Though radio and television are ____ popular in the world today, I think the TV is ____ useful.——Of course, on TV we can see and hear what is going on home and abroad.
下图中的民居多见于我国的( )
生态系统的组成包括( )
____
江南春
杜牧
千里莺啼绿映红,水村山郭酒旗风。
南朝四百八十寺,多少楼台烟雨中。
这首诗表达了诗人怎样的感情( )