已知二叉树后序遍历序列是dabec，中序遍历序列是debac，它的前序遍历序列是(

Anger is a kind of feeling. Many things can make you angry. When your teacher gives you too much homework, when your team loses an important game, when a friend borrows your favorite thing and then breaks it, you may get really angry.

Usually, your body will tell you when you are angry. For example, you breathe faster, your face turns red, and you may want to break something or hit(打) someone, but sometimes, you hide(隐藏) your anger. For example, you may hide it in your heart. The problem is that if you do this, you may get a headache or your stomach may hurt.

In fact, it’s not good to hide your anger, and it’s normal for you to get angry sometimes. But anger must be let out in the right way, without hurting others or yourself.

When you get angry, you can talk about it with other people. It’s helpful to talk about your anger with an adult, such as parents, a teacher, etc. When you talk about anger, those bad feelings can start to go away. Here are some other things you can do when you start to feel angry: talk to a good friend; count from 1 to 100; give someone a hug(拥抱); go for a bike ride; think about good things, etc.

Remember that how you act when you are angry can make everything better or worse. Don’t let your anger control you.

小题1:You may not get angry when ____.

A．there is too much homework on this weekend

B．your favorite basketball team wins the game

C．a friend breaks your favorite thing

D．your parents don’t let you watch TV小题2: ____ shows that you’re not angry.

A．Taking a faster breath

B．Getting a headache

C．Getting a stomachache

D．Wanting to protect someone小题3:According to the passage, you can do everything when you get angry except(除了) ____.

A．go for a bike ride

B．think about good things

C．talk to a good friend

D．say bad things to the people around you小题4:The underlined word “control” in the last paragraph means____ in Chinese.

A．控制

B．连接

C．帮助

D．失去小题5:This passage is mainly about ____.

A．anger

B．excitement

C．happiness

D．sadness

（16分）为了使粒子经过一系列的运动后，又以原来的速率沿相反方向回到原位，可设计如下的一个电磁场区域（如图所示）：水平线QC以下是水平向左的匀强电场，区域Ⅰ(梯形PQCD)内有垂直纸面向里的匀强磁场，磁感应强度为B；区域Ⅱ(三角形APD)内的磁场方向与Ⅰ内相同，但是大小可以不同，区域Ⅲ(虚线PD之上、三角形APD以外)的磁场与Ⅱ内大小相等、方向相反．已知等边三角形AQC的边长为2l，P、D分别为AQ、AC的中点．带正电的粒子从Q点正下方、距离Q点为l的O点以某一速度射出，在电场力作用下从QC边中点N以速度v₀垂直QC射入区域Ⅰ，再从P点垂直AQ射入区域Ⅲ，又经历一系列运动后返回O点．（粒子重力忽略不计）求：

（1）该粒子的比荷．

（2）粒子从O点出发再回到O点的整个运动过程所需时间．

谁的实验室没有做出核裂变（）

A、约里奥·居里实验室

B、费米实验室

C、波尔实验室

D、希拉德实验室

下列工程中属于分项工程的是( )。

A．电气工程

B．屋面工程

C．装修工程

D．玻璃幕墙工程

（）通常是以工时或完成产品的计数计算员工应当获得的劳动报酬。

A．工作

B．薪金

C．奖金

D．福利