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"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.\

Why did the author stop giving speeches for a while（）

A. The death of his stepbrother makes him feel guilty

B. The development of seat belt avoided most accidents

C. There are no more requests from schools inviting him

D. He did not have enough time to give lectures at that time

外国甲公司收购中国境内乙公司的部分资产，收购价款为160万美元，并以该资产作为出资与境内丙公司于2008年4月1日成立了一家中外合资经营企业。甲公司支付乙公司收购价款的下列方式中，符合外商投资企业法律制度规定的是( )。

A．甲公司于2008年6月30日向乙公司支付80万美元，2009年3月30日支付80万美元
B．甲公司于2008年6月30日向乙公司一次支付160万美元
C．甲公司于2009年3月30日向乙公司一次支付160万美元
D．甲公司于2008年9月30日向乙公司支付100万美元，2009年6月30日支付60万美元

“弘扬传统文化”与“借鉴西方文化”不是此消彼长的“抗衡”关系。按照鲁迅先生“拿来主义”的观点，有选择地引进一些西方文化精华，对弘扬传统文化，倒是大有裨益。我国传统文化势微的根本原因并不是因为外来文化的侵袭，“抗衡”一说除了让人产生大战将至，硝烟弥漫的感觉外，更让人警醒对待外来文化的态度。他山之石，可以攻玉，在全球经济日益融合的今天，必须批判吸收“老外的文化”，而非一味抗衡。 根据这段文字，可知作者同意以下哪种说法( )

A．弘扬传统文化不应一味“抗衡”外来文化

B．弘扬传统文化需要考虑自身特点

C．有些边缘化的传统文化逐渐中心化

D．弘扬传统文化是一项复杂的系统工程

三羧酸循环最重要的生理意义在于（）

A.使糖、脂肪、氨基酸彻底氧化供能

B.作为糖、脂肪、氨基酸互变的枢纽

C.消除物质代谢产生的乙酰CoA，以防在体内堆积

D.消除糖酵解产生的乳酸，以防产生酸中毒

E.产生CO₂供机体生物合成

现代农业、常规农业的负效应主要有（）。

A.生产成本降低

B.资源紧缺

C.能源过度消耗

D.污染加剧