肺动脉瓣区第二音亢进和固定分裂多见于（） A.动脉导管未闭 B.室间隔缺损 C.房间

工程造价资料积累的内容有( )。

A．量(工程量、材料量、设备量)

B．技术经济条件

C．价

D．预算依据

E．编制竣工决算的依据

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.

变更控制系统包括了从项目变更申请、变更评估、变更审批到变更实施的文档化流程。

为了保持自身的身心平衡，美国卫生学会提出了11条要诀，下列不属于的是（）。

A、倾诉烦恼

B、暂时逃避

C、处处为人着想

D、偶尔也要屈服

采煤机落道的预防措施有哪些？