根据短文内容，完成下列各题。

    Fire can start in forests, homes and schools. It is very dangerous. What should we do when there is a fire? We should go outside quickly. And we have a fire drill at school every year.

    A fire drill is not a real fire, It helps us prepare for(为……准备) a real fire. This map tells us the way in a fire. We can follow the fire exit(出口) signs too. First, the fire alarm sounds. Next, we all line up and go out quickly. We leave all our things in the classroom. Then we walk down the stairs and go outside. We line up in the playground. Our teacher checks on the number of students. We should wait for the firemen to come.

①宪法是国家的根本大法

②宪法是一切组织和个人的根本活动准则

③宪法是治国安邦的总章程，是其他法律的总和

④宪法具有最高法律效力，可以替代其它法律

在民间流传的《杨家将》中，经常发生一旦边关有战事，宋朝就选拔将帅带兵出征的现象，这实际上反映了宋朝（   ）

森林遭到严重砍伐后，我们可能面临下列哪些问题？（　　）