【Abstract】China is trying to make the“blacklist”of air passengers and legal provisions are not perfect. This paper a......

【Abstract】The principle of politeness is the highest principle in conversation. It has different meanings in different......

这是一对夫妻专家。顾安邦教授生长在江苏,徐君兰教授生长在四川,一个在东南,一个在西南,现同为重庆交通学院教授,是新中国的一座......