how are the duties of firefighters similar to the duties of police officers?how are they different?
what do firefighters hope will happen as a result of teaching children about fire safety?
if you saw several ladder trucks with very long ladders on them racing down the street with their sirens blaring,where might they be going and what might they be on their way to do?
when a firehouse receives an alert that there is a fire,how do you think firefighters decide which kind of firefighting machine to send?
谢谢各位，最好是简单一点