对于每个操作主控角色，只有拥有该角色的域控制器便可以进行相关的目录改变。
参考答案：对
(2012·厦门高二检测) A new report says each year about two million people die from accidents and diseases related _______ their jobs.
A．to
B．with
C．in
D．into
简述手提式干粉灭火器的组成。
