选择题：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?

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?学历类问答题,升学考试问答题,小学升初中问答题

五(6)班图书角书架中的图书，故事书占1/3，漫画类占1/4，科技类占2/5，其余为文体类，文体类占这些书的几分之几?学历类问答题,升学考试问答题,小学升初中问答题

北京和呼和浩特相距660千米. 一列火车从呼和浩特开出，每时行驶48千米; 另一列火车从北京开出，每时行驶72千米.两列火车同时开出，相向而行，经过几时相遇?两车相遇时，从北京开出的火车比从呼和浩特开出的火车多行了多少千米?学历类问答题,升学考试问答题,小学升初中问答题

用边长30厘米的正方形地砖铺一段长12米，宽6米的人行道路面.①至少需要多少块这样的地砖?②如果地砖每平方米的售价是35元，那么购买地砖至少应花多少元?学历类问答题,升学考试问答题,小学升初中问答题

“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?学历类问答题,升学考试问答题,小学升初中问答题