X射线管中焦点的形状分为哪两种？各适用于什么分析方法？

已知|a|=2，|b|=3，a＞b，则a+b=______．

阅读理解。

     Anger (生气) is a kind of feeling. Many things can make you angry. When you have a lot of homework

to do, when your team loses an important game, when a friend borrows your bike and breaks it, you can

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 someone, but sometimes you hide 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 is not good to hide your anger, and it is important 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 is helpful to talk about your anger with

an adult, such as a parent, 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; 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.

1. Which of the following may make us angry?

A. We have a lot of homework.

B. We hide our feeling.

C. We talk with our parents.

D. We count from 1 to 100.

2. It is better to _____ when you feel angry.

A. lose your game

B. talk to someone about it

C. hit someone hard

D. hide it in your heart

3. We can infer from the passage that it is _____ to get angry.

A. helpful

B. serious

C. wrong

D. normal

一男性患者，40岁。诉头痛头晕，颈侧弯后伸后头晕加重并出现猝倒。肱二头肌腱反射亢进，颈椎斜位片显示钩椎关节增生，你认为最大可能是（）。

A．美尼尔征

B．体位性眩晕

C．脊髓肿瘤

D．椎动脉型颈椎病

E．粘连性蜘蛛膜炎

To protect you and your fellow passengers, the Transportation Security Administration (TSA) is required by law to inspect all checked baggage. As part of this process, some bags are opened and inspected. Your bag was among those selected for inspection.

During the inspection, your bag and its contents may have been searched for items forbidden by law such as fireworks, fuels, gunpowder, etc. At the completion of the inspection, the contents were returned to your bag, which was resealed (重新封口) with a “special” lock.

If the TSA screener was unable to open your bag for inspection because it was locked, the screener may have been forced to break the locks on your bag. TSA sincerely regrets having to do this, and has taken care to reseal your bag upon completion of inspection. However, TSA is not liable for damage to your locks resulting from necessary precaution.

For packing tips and other suggestions that may assist you during your next trip, visit: www.tsatraveltips.us.

We appreciate your understanding and cooperation .If you have questions, comment,or concerns , please feel free to contact the Transportation Security Administration Consumer Response Centre:

Phone: toll-free at (866)289-9673

Email:telltsa@tas.dot.gov

Section 110(b)of the Aviation and Transportation Security Act of 2001,49

USC&44901(c)-(e)

小题1:The leaflet(宣传单) is trying to __________.

A．introduce one of the security acts

B．persuade people to contact TSA

C．warn against the damage of locking the baggage

D．inform people of baggage inspection小题2:The leaflet is most probably provided by TSA to those who __________.

A．had their baggage selected for inspection

B．refused to have their baggage checked

C．kept some damaged items in their baggage

D．left their baggage unlocked小题3:The underlined word “liable” means ___________.

A．suitable by law

B．permitted by law

C．responsible by law

D．prepared by law小题4:For packing tips and other suggestions, visit __________.

A．telltsa@tas.dot.gov

B．www.tsatraveltips.us

C．toll-free at (866)289-9673

D．TSA Consumer Response Centre

在肺炎双球菌的转化实验中，R型细菌转化成S型细菌的转化因子是（）。

A.荚膜

B.S型细菌的DNA

C.蛋白质

D.R型细菌的RNA