I didn’t like the job, because it lacked________, that is to say, I was doing the same thing all the time.
A:variety
B:energy
C:reward
D:benefit
株洲的历史文化底蕴深厚,有神农湖、神农阁、神农坛等景观,这些景观的命名是为了纪念中华民族的始祖( )
胡萝卜素在人体内可以转化为维生素A,常吃富含胡萝卜素的玉米有助于预防( )
____