单选题中国古代有许多重大发明，下列发明按出现的先后顺序排列正确的是A.司南、纸、火药、

阅读理解 According to a new survey, student safety has become a big problem. Nearly 50% of students say they are worried about robbery(抢劫) on the way to and from school. Now in many big cities in China, some schools have taught an unusual lesson: self-protection(自我保护). Students like this lesson because there are no exams or boring classes. And they can learn how to save lives and know how to stop danger before it really happens.Chen Haoyu, a teacher at Beijing No.25 Middle School and a self-protection expert(专家), gives young students advice on how to deal with danger. If you are robbedKeep calm. If you can not cry for help or run away, give the robber your money. Try to remember what the robber looks like and tell the police later.If you are in a traffic accident If a car hurts you, you should remember the car number; if it is a bicycle, try to call your parents before you let the rider go. This is because you don’t know how badly you are hurt.If it is raining hard and there is lightning(闪电) Don’t stay in high places and keep away from trees. When there is a fireGet away as fast as you can. Put wet things on your body and try to find an exit (出口).Do not take the lift! If someone is drowning (溺水)If you can’t swim, don’t get into the water. Cry out for help. Remember that danger is never as far away as you think. Take care of yourself at all times!1.Why do students like the self-protection lesson? ①Because there are no tests.②Because the lesson is boring. ③Because they can learn how to save lives.④Because they know how to stop danger before it happens.A.①②B.②③C.①②④D.①③④2.If your house is on fire, you must _______.A.putdrythingsonyourbodyB.runquicklyandtaketheliftC.runawayandfindanexitasquicklyasyoucanD.takeeverythingyouhaveandthenrunaway3.The best title for the passage is .A.How to Keep CalmB.Self-protectionC.An Unusual LessonD.Danger

DCB解析1.根据文章的内容可知

我学会了

我也是这个答案

A解析本题考查古代发明，司南是战国时期的、在西汉早期就有了纸、唐朝时期有了火药的配方、北宋毕昇的活字印刷，所以选A项。

如以上回答内容为低俗、色情、不良、暴力、侵权、涉及违法等信息，可以点下面链接进行举报！

点此我要举报以上问答信息