while和as的区别( )modeling business is by no means easy to get into,the good models will always be in demand.A.while B.as 为什么选A而不选B呢?

as 和 while 的区别... When while as的区别和用法 When while as的区别和用法 when 和 while ,as的区别 as when while 的区别 when ,while,as的区别 while与as的区别 while,as soon as,when的区别 as soon as 和when和while的区别?要精华. 我想知道when, while, as soon as 三个的区别和用法多举些例子 as/since/until/when/while的区别 as when while since的区别 when、while、as、whenever的用法区别 when、while、as、whenever的用法区别 while,when ,just as 的区别 as,when,while的区别是什么 求when,while,as用法的区别! while,as,when 区别?