用所给词的适当形式填空。(每空一词)

小题1:Yesterday afternoon my uncle had his bicycle _________(repair).

小题2:She can’t be a nurse because she is _____________(patient).

小题3:Stop__________(argue) about it. Let’s be friends again.

小题4:I think the new computer is            (value).

小题5:A __________ (week) round-up of sports will come after this music programme.

在先左后右的原则下，根据访问根结点的次序，二叉树的遍历可以分为三种：前序遍历、 遍历和后序遍历。