舜发于畎亩之中，傅说举于版筑之间，胶鬲举于鱼盐之中，管夷吾举于士，孙叔敖举于海，百里奚举于市。

    故天将降大任于是人也，必先苦其心志，劳其筋骨，饿其体肤，空乏其身，行拂乱其所为，所以动心忍性，曾益其所不能。

    人恒过，然后能改；困于心，衡于虑，而后作；征于色，发于声，而后喻。入则无法家拂士，出则无敌国外患者，国恒亡。

然后知生于忧患，而死于安乐也。

新中国成立初期，中央人民政府公布的土地改革法令是（   ）

    Hello, my name is Qin Long. I'm a student in 1big school. There are2buildings in it.

    Two classroom buildings 3on the left of the office building. My classroom is in the red classroom building.  4is next to the brown classroom building. On the 5 of the office building are the 6 and the sports hall. There are lots of books in the library. I7there on Thursday afternoon.I play basketball 8.I go to the sports hall on Friday afternoon.9 is behind the sports hall?The dining hall.We10there.The food is delicious.

日常生活中，我们经常会遇到一些化学问题。试根据所学化学知识判断，下列①~④的做法中正确的是（  ）
①用苛性钠稀溶液除去炉具上的油污 ②用硫酸制作汽车蓄电池
③用生石灰降低土壤碱性           ④用多喝食醋的方法缓解胃酸过多