BLP的安全策略对所有主体和客体都分配一个访问类属性,包括主体和客体的 ___ 和___, 系统通过比较主体和客体的___ 控制主体对客体的访问。

问答题From the perspective of human resources, low-end manufacturing has the characteristics of low added value,[填空1][填空2]. Correspondingly, the jobs provided by it have the characteristics of low income, low technical skills and [填空3].

单项选择题‎如图所示，将一带负电的物体M靠近一不带电的导体N，在N的左端感应出正电荷，右端感应出负电荷。若将导体N的左端接地，则( )‏ ‎‏