简述CSM 300C远动主站的工作原理。
新闻摄影都具有新闻价值、（）等几个特性。 ["真实性","思想性","形象性","导向性"]
下列单位中属于基本生产的单位是（）。 ["A.准备车间","B.工具车间","C.变电所","D.试制车间"]
If necessary to avoid collision or allow more time to（）the situation，a vessel shall slacken her speed or take all way off by stopping or reversing her means of propulsion． ["access","process","profess","rece"]
光圈的功能（）。 ["调节成像的照度","调节景深","调节成像质量","调节速度"]
CSI 200B、C测控单元有何功能？
