四边形 ABCD是的内接四边形，AB 的延长线与DC的延长线交于e点，且CB=CE。证明：角D=角E

人呼出的气体中成分最多的是什么?

如图，两个线圈绕在同一根铁芯上，其中一线圈通过开关与电源连接，另一线圈与远处沿南北方向水平放置在纸面内的直导线连接成回路。将一小磁针悬挂在直导线正上方，开关未闭合时小磁针处于静止状态。下列说法正确的是( )

下面哪个成语故事与项羽有关()

“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?