Any alteration of course and／or speed to avoid collision shall，if the circumstances of the

Before using or operating any equipment, you should first _____ its manual thoroughly and understand its contents_____.

— Which city has _________population, Beijing, Guiyang or Nanchang？— Beijing, of course.

A campus emergency ______ occur at any time of the day or night, weekend, or holiday,

If its a birthday or any other type of event then you go ahead and make a story or a______

Which one is one of the most important factors in the success or failure of any IT pro

●The Systems Development Life Cycle （SDLC) is a process of creating or altering informatio