airport security

Airport Security
Some people are worried about flying.However,we don't often see plane accidents.There are all kinds of airport safety checks.So you don't have to worry about it too much.For example,there are X-ray machines to check the bags.Also,people walk through a machine that can chece if anyone has angthing dangerous.People may not take knives or scissors on the plane.
Once you are on the plane,read the airline safety bool.If tells you what to do when something happens.
Okay,don't worry and enjoy the flight.
1、What is the story maily about?
2、What do they use to check the bags?
3、What may not people take to the plane?
阅读技巧
1、在英语中，用指示代词来替代行文前后的所指，就是英文简洁的风格。阅读短文，请说明文章中两个It各指代什么？
2、学习和扩大词汇的一个重要方式是在语篇中学习，因为语篇提供了词汇应用的语境。用worried accidents safety machines plane完成下列句子。
①I am not______avout her.
②Car_____happens everyday in China
③The police are concerned about the_______
④There are big_____in the factory
⑤Will the_______take off on time?
3你还知道有关飞行安全检查的哪些知识？