综合安全技术在非电离辐射的控制和防护作用中，对______的防护是屏蔽和增大与辐射源

"I was just like you--I’ thought I was invincible," says Adam Blomberg, standing before 400 students in a darkened auditorium at Miami’s Coral Reef Senior High School. A photo of a bloodied and unconscious teenager, a breathing tube protruding from his mouth, flashes on the wall.

"That was me," he says. There’s a collective gasp before the room grows silent and Blomberg,31, an anesthesiologist who trained at Brigham and Women’s Hospital in Boston, begins the story of what happened one night in February 1995.

He created a presentation illustrating the dangers of behaving irresponsibly in a car, from not buckling up to speeding to driving under the influence of alcohol and drugs. He tracked down photos of teen crash victims from the center’s archives, then incorporated statistics and his own experience. He spoke the first time to a local Boy Scout troop and was soon giving his talk, "A Survivor’s Story," at high schools around the state.

The Blomberg family had reason to celebrate. Adam had fully recovered and was on his way to fulfilling his lifelong dream of becoming a doctor. But in January 2000, Blomberg’s 22-year-old step-brother, Michael, was killed in a crash while driving to his Atlanta home late one night. He wasn’t wearing a seat belt. After the accident, Blomberg stopped telling his story to crowds, racked with guilt over his inability to reach Michael. If Blomberg had failed his own brother, he reasoned, how could he possibly make a difference to a roomful of strangers Requests from schools continued to roll in, but he turned down every one.

Then Blomberg got a call from a high school counselor. As he started into his standard excuse-lack of time—he looked across the room at a stack of thank-you notes from students who had heard him speak. He realized that kids needed to hear what he had to say. He agreed to visit the school and began contacting others on the waiting list for his talks.

Blomberg leaves the school hoping he has changed someone’s behavior. He recalls a letter he received from a student who heard him speak and got into a crash later that same day but was unharmed. " She told me she was wearing her seat belt because of me."

Letters like this reinforce his belief that he survived the accident for a reason. "There are a lot of physicians in the world, and we all save lives," he says. "I have a special opportunity to save lives not just as a doctor but also as a human being.\

What makes him regain his belief in the value of his speeches（）

A. Constant invitation calls from schools

B. The death of his stepbrother Blomberg

C. The thank-you letters confirming his speeches’ values

D. Numerous accidents he heard of

2007年国庆长假刚过，牛市的步伐显得更加急促，开市伊始的四个交易日，上证指数就上冲了近400点。购买股票和债券的居民增加。回答2-3题。

2、债券与股票相比

A.从性质上看，它是所有权证书 B.从收益上看，它的回报率最高

C. 从发行上看，它的主体是银行 D.从偿还上看，它可以还本付息

3、按照从安全性强(而收益率低)到安全性差(而收益率高)的顺序排列债券，正确的是

A、政府债券、公司债券、金融债券　　　　B、公司债券、金融债券、政府债券

C、政府债券、金融债券、公司债券　　　　D、国库券、建设债券、公司债券

心理因素和（）因素在黄褐斑的起因过程中起着不可忽视的作用。

A.情绪

B.环境

C.生活习惯

D.脏腑功能

（）中把“九”定为阳数，九月九日，两九相重，故而叫重阳，也叫重九。

加油站站长应经安全培训考核合格后上岗；所有员工（包括新员工、转岗工、劳务工、代培人员等）上岗前应经（）培训，考核合格后上岗。