练习题

rational
When people are very angry ,they seldom act  in a rational way.
rigid
In our home ,it's a rigid rule to wash one's hands before eating.
timid
A timid child is up to cry when he sees a strage person.
vertical
A vertical take off aircarft can rise straight on the ground without running along for  some distances.
wholesome
Such a movie is not wholesome for young person.