在防烟排烟系统中，需要半年检查的部件有（）。 A.防火阀 B.挡烟垂壁 C.送风阀

认知治疗基本技术()
行为治疗基本技术()
来访者中心治疗基本技术()

A．满灌疗法

B．检查负性自动想法

C．自由联想

D．鼓励病人情感的自由表现

E．控制个人利益

Volunteering can help you deal with stress and problems, have more confidence, and introduce you to exciting new ideas and people. But what kind of volunteering should you do?

Firstly, think about what you enjoy. What are you interested in? What do you want to be when you grow up? For example, if you love animals, you can volunteer to care for abandoned(被遗弃的) pets or injured wildlife. If you want to grow up to be a doctor or a nurse, you can look for a youth volunteer program at a local hospital.

Secondly, think about what you’re good at. What skills do you have? What kinds of jobs do you do best? Try to find a volunteer position that will let you make the most of your strengths and talents. For example, if you’re a great speaker, then you could try educating others about a problem you care about. If you’re a cook, you might find a way to help feed hungry people in your area.

Thirdly, look for what your own community needs. What should be improved in your town, city, or school? What types of volunteer projects would do the most good? For example, if there are a lot of homeless people in your area, you could raise money to help them. If your town has empty areas filled with dirt or rubbish, you could organize or join a group to plant trees and flowers to make these areas more attractive.

The problems of the world, or even just of your community, might seem gigantic. Some people might even feel like there’s no point trying to do anything, since what they can contribute seems so small. But every person is important, and can do some good and make a difference. Like you!

小题1:What is the text mainly about?

A．How to be a good volunteer.

B．What we can do when we grow up.

C．What kind of volunteering one can do.

D．How to improve society by volunteering.小题2:The text does NOT mention _____ as a basis for volunteering. 

A．interests

B．abilities

C．people’s needs

D．what one gets in return小题3:The word “gigantic” in the last paragraph can be replaced by “_____”.

A. huge     B. serious    C. meaningless   d. different

小题4:How is the text mainly developed?

A．Through reasoning.

B．Through similarities.

C．Through examples.

D．Through explanations.

铸造腭板的厚度要求约为（）

A.0.2mm

B.0.5mm

C.0.8mm

D.1.0mm

E.1.5mm

氢原子的能级如图所示，已知可见光的光子能量范围约为1.62eV～3.11eV．下列说法正确的是（　　）

A．处于n=3能级的氢原子可以吸收任意频率的紫外线，并发生电离

B．大量氢原子从高能级向n=3能级跃迁时，发出的光具有显著的热效应

C．大量处于n=4能级的氢原子向低能级跃迁时，可能发出6种不同频率的光

D．大量处于n=4能级的氢原子向低能级跃迁时，可能发出3种不同频率的可见光

下述是急性心肌梗死的全身症状，除了（）

A.发热

B.心动过速

C.白细胞增高

D.血沉增快

E.镜下血尿