小测验：选择正确的单词

1. recurring decimal
   循环小数
   

1. This theme recurs constantly throughout the opera.
   这一主旋律在该歌剧中不断出现.
2. Leap year recurs every four years.
   每四年闰年一次。
3. To recur or visit often,especially as a ghost.
   尤指鬼魂重回或常去
4. The dream recur throughout her life.
   这个梦在她的一生中反复出现。
5. Let us recur to the subject later on.
   让我们稍后再重回到我们的主题。

　1个形容词解释