Do we need to show our ID cards when checking in?检票登机的时候要出示身份证吗

今天的几个句子是有关检查的：1.What about our luggage? 我们的行李怎么办？2.We have to open each for inspection. 我们得把包裹都打开以供检查。3.Are they going to frisk all the passengers? 他们要搜查每个乘客的身体吗？