将森林转换为对应的二叉树，若在二叉树中，结点u是结点v的父结点的父结点，则在原来的森林中，u和v可能具有的关系是()。
Ⅰ．父子关系
Ⅱ．兄弟关系
Ⅲ．u的父结点与v的父结点是兄弟关系@A@只有Ⅱ@B@Ⅰ和Ⅱ@C@Ⅰ和Ⅲ@D@Ⅰ、Ⅱ和Ⅲ
A. 只有Ⅱ
B. Ⅰ和Ⅱ
C. Ⅰ和Ⅲ
D. Ⅰ、Ⅱ和Ⅲ
查看答案
A ______ is a variety of language that serves as a medium of communication among groups of
A. lingua franca
B. register
C. creole
D. dialect
Usually when divorcing, laws of which country might be most favorable to the wife financially？
A. Malta.
B. England.
C. France.
D. Austria.
The word "acquest" in Paragraph 2 probably means
A. property prior to the marriage.
B. property before and after the marriage.
C. assets after the divorce.
D. assets built during the marriage.
Which of the following can best summarize the passage？
A. The reform. of postal services is undergoing in Europe.
B. Protectionism hampers the reform. of Europe's postal services.
C. Monopolies of postal services are to be broken up.
D. The European market of postal services is open to competition.
微信支付 
支付宝支付