In my opinion, working in the library is more ____ (interest) than doing homework.
南京被称为六朝古都见证了中国历史的变迁,请回答。
塔里木盆地位于( )
设F1和F2为双曲线x24-y21=1的两个焦点,点P在双曲线上,且满足∠F1PF2=900,则⊿F1PF2的面积是 ( )