絮凝剂的作用是使水中悬浮物质的（）凝聚，同时去除部分（）和（）。
Which two statements about the open and shared key wireless-authentication methods are true？ （） [" Shared key authentication is considered more secure than open authentication."," Shared key authentication is considered less secure than open authentication."," If the WEP keys do not match using the open authentication method， the client will not authenticate， associate， and transfer data."," If the WEP keys do not match using the open authentication method， the client will still be able to authenticate and associate， but will not transfer data."," If the WEP keys do not match using the open authentication method， the client will still be able to authenticate， associate， and transfer data."]
综合重合闸有几种运行方式？各是怎样工作的？
我国反对霸权主义和强权政治针对的是（）。 ["具体的霸权、强权行径","任何军事集团","某个国家集团","某个大国"]
责任会计系统中处于责任中心最高层次的（）。
变质岩
