— Why not ______ for dinner with us?
——Would you mind turning down the music?
——__ _.
Bob swims ________ than I, but he doesn't swim_________ my brother.
一个生态系统的四种生物构成了一条食物链,在某一时间它们的相对数量关系如图所示.下列说法肯定不正确的是( )