何谓事故调查的“三不放过”？

大周期训练计划的主要内容

阅读理解。

     Camille Mahlknecht, 9, has some big fun planned for this weekend. She and other residents of

Agoura Hills, California, plan to pick up trash during their city's annual cleanup. At the same time,

Wissam Raed, 12, will be busy volunteering too. Thousands of miles away in Lebanon, Wissam plans

to put on a play at an orphanage and bring potted plants to elderly people at a senior citizen center.

     Some other children like Nathan White, 10, have personal reasons for volunteering. Nathan's

grandmother died of a heart attack. To help raise money for medical research, Nathan participated in

Jump Rope for Heart. He and five other boys took turns jumping rope for two and half hours and

collected more than US$1,200 in donations for the American Heart Association.

     Millions of children around the globe lend a hand to their communities every year. Schools and

parents also contribute to the rise in youth service. For example, many schools offer community service

activities for students to join. Teachers either combine volunteer work with classroom lessons or make

service work a requirement. Parents, on the other hand, encourage their kids to volunteer and do it with

them.

     Community service is particularly important in this depression time. As the need for monetary support

and other aid has increased, many charitable organizations have experienced a significant drop in

donations. Camille and other children who volunteer thousands of hours annually can fill in some of the

gaps.

     According to research, kids who start volunteering are twice as likely to continue doing good deeds

when they are adults. So, grab a paintbrush, a trash bag, or whatever you need to help your community.

You'll love how you feel after helping others. Even dirty work can be lots of fun, if it's for a good cause.

1.What's the writer's purpose of writing this passage?

A. To recommend youth service programs to schools.

B. To ask charity organizations to serve the community.

C. To urge children to take part in volunteering activities.

D. To propose alternatives for doing community services.

2.What is the main idea of the 3rd paragraph?

A. Community service is gaining popularity among children.

B. Families and schools help to make community service popular.

C. Children now depend more on their teachers than on their parents.

D. Nathan White had a special reason to raise money for medical research.

3.Why is community service important in a time of depression?

A. It raises money for school activities.

B. It teaches children to take care of the sick.

C. It gives charity organizations some needed help.

D. It encourages parents and teachers to work together.

4.What can be inferred from the passage?

A. Community service can help prevent juvenile delinquency(青少年犯罪).

B. Children will probably leave school and work as volunteers.

C. Organizing sports events for the school is a kind of community service.

D. Children who do volunteer work are more likely to grow up to be caring adults

高血钙危象的临床表现中，不包括（）.

A.严重呕吐、脱水、高热

B.嗜睡、意识不清

C.碱中毒

D.迅速出现肾衰竭，心律失常甚至心搏骤停

E.血清钙增高达4～5mmol/L时，即有生命危险

鉴别原料品质优劣最重要、最基本的标准是（）。

A.产地

B.新鲜度

C.成熟度

D.口味

NJ07型列车的救援列车可以控制故障列车的紧急制动、停放制动、司机室对司机室的通讯、司机室对客室通讯。