五(1)班有学生50人，其中有女生21人，男生占全班人数的几分之几?

“Early to bed ，early to rise ”makes a man healthy, wealthy and wise.It's good for the body.This is an old saying . Have you heard of it before? It means that we must go to bed early at night，and get up early in the morning.Then we shall be healthy.We shall also be rich and clever.That is true .The body must have enough sleep to be healthy.Children of young age should haveenough sleep ，or they can't do their work very well. They will not be wise and they may not become。wealthy! .The body also needs exercise: walking, running, jumping, swimming, playing games and all other。exercise .Exercise keeps the body strong. Exercise also helps the blood to move around inside the.body .This is very important.Our blood takes food to all parts of our body.The head also needs.blood .Exercise helps us to think better.

根据短文内容 ，回答问题.

1.What does “early to bed .early to rise ”mean?

2.What must the body have to be healthy?

3.What will happen to Children of young age who don't have enough sleep?

4.What keeps the body strong?

5.What takes food to all parts of our body?

已知一个梯形的面积是58平方厘米，它的上底是15厘米，下底是25厘米，它的高是多少厘米?

书面表达。

以一种文具为题按要求写一篇英语小作文。

要求：1.要写出此文具的主要特点。

2.条理清楚，意思连贯，标点正确，书写规范 。

3.不少于50个单词 。

简答同时履行抗辩权的成立要件。

为什么说教育在人的发展中起主导作用?

中国《教育法》中对各级各类学校及其它教育机构中的学生的基本义务做了哪些专门规定 ?

简述“发扬积极因素， 克服消极因素”这一德育原则的基本含义和贯彻要求。

比较脑功能的定位说、整体说、机能系统学说和模块说的基本观点。

简述开放系统的主要特征。