题目内容
期前收缩心电图中的代偿间期是指
查看答案
搜索结果不匹配？点我反馈
更多问题
关于心房颤动的表述，不正确的是
以自律性增高为主要发生机制的室性心动过速是
房室折返性心动过速的折返环
A Heroic ProfessorA) In Flint, Michigan, there is a famous block of concrete (混凝土) that for decades has served as a community message board. This week, several residents went to “The Block” with a message. In big, black capital letters they painted: “YOU WANT OUR TRUST?? WE WANT VA Tech!!!” Underneath they wrote “PSI” and circled it in red with a line through it. It stands for Professional Service Industries Inc., the independent business the city had wanted to hire to test its water for contamination, and which the residents don’t trust. They want Marc Edwards. And now, they’re getting him.B) On Wednesday, Michigan Governor Rick Snyder announced that he was appointing Edwards to the newly created committee tasked with finding a long-term strategy to address the water crisis. The 17-person team of experts will have three years to report their recommendations. Edwards is the environmental engineering professor from Virginia Tech who once led, almost entirely on his own, a campaign against the federal government’s failure to protect residents of Washington from lead in the city’s water. And he won.C) After helping to expose that water crisis in 2004, Edwards spent six years challenging the Centers for Disease Control and Prevention (CDC) to admit they weren’t being honest about the extent of the damage the lead had on children. He burned through thousands of dollars of his own money, as well as $500,000 from a MacArthur Foundation genius grant he won in 2008, to take on the federal government. He was threatened. Then, in 2010, he was proved to be correct when it was found that the CDC had lied to the public in a misleading report, which falsely claimed lead levels in the water had not posed a health risk to D.C. residents. “I’m obsessed with what happened in Washington, D.C.,” Edwards said in an interview last week. “Since 2005 through the present day, I’ve been trying to make sure another D.C. wouldn’t happen.”D) And then his phone rang in April 2015. It was a woman named Leeanne Walters, a Flint, Mich., stay-at-home mother who was getting nowhere convincing state and local officials that there was something seriously wrong with the orange-colored water coming out of her tap. Her family’s hair was thinning. Her son’s skin was red and irritated. They told her the water was perfectly safe. And even months later, when it had been determined there were large amounts of lead in her water, the officials dismissed it as an isolated problem. Desperately, she called Edwards, whom she had read about online. Over the phone, he walked her through how to take her own water samples. The next day she sent them FedEx to Edwards to test.E) It was the worst lead levels he had ever seen. “When we saw that my heart skipped a couple of beats,” he said. “The last thing I needed in my life was another confrontation with government agencies. But it was us or nobody.” He shared his findings with the Environmental Protection Agency (EPA). He hoped the system would work this time. But in July, a high level EPA official ignored it and told the mayor of Flint everything was fine. The mayor famously went on television and drank a glass of the city’s water to prove that all was well. Edwards was extremely angry. It felt like history repeating itself.F) So he formed a team of researchers at Virginia Tech and collected hundreds more water samples. He set up a website to update the public on his findings and hold the government accountable. He filed Freedom of Information Act (FOIA) requests for documents and emails of state and city officials to find out how much they knew and what they could be covering up. It turns out that they knew a lot and did nothing. He is again largely funding this effort out of his own pocket. He received a small $33,000 emergency grant from the National Science Foundation, but he has estimated that he’s spent another almost $150,000.G) Edwards is a father of two teenagers. When he first started exposing the perils of lead water, his kids were two and four. He teaches a course on ethics and heroism at Virginia Tech. He tells his students that everyone has it in them to be heroic. “I feel like I’m doing the job I was born to do,” he said. “I get up every day with such a sense of purpose I wish everyone could experience something like that once in their life.”H) His colleagues in the field describe his passion and commitment. David Dzombak, a Carnegie Mellon University professor, met Edwards when he was a graduate student in 1988. He recalled Edwards speaking at a conference in 2002 warning other scientists to take seriously the threat of worsening water infrastructure (基础设施). Even if it wasn’t the hottest research topic of the moment, he told them it was their obligation as civil engineers to protect the public. “I remember it vividly,” Dzombak said. “He challenged his colleagues to talk about their priorities.”I) Bruce Lanphear, a professor at Simon Fraser University and also an expert in lead toxicity (毒性), said Edwards not only studies the impact of lead in water, but he makes his testing available to communities in need, like he did in Flint. “What I think he does so beautifully is he fills a void (空白) that has been neglected,” Lanphear said. “He’s got passion and persistence. He’s taken this problem on and he’s going to help fix it. There’s an arrogance in the best sense of the word. There’s no question he will help force us to deal with it.”J) The work is far from over. Edwards sees his role as continuing to hold the government accountable to the residents of Flint. He’ll share his scientific knowledge and continue to advocate for better civil servants. “I didn’t get in this field to stand by and let science be used to poison little kids,” Edwards said. “I can’t live in a world where that happens. I won’t live in that world.”11.Marc Edwards succeeded in getting the CDC to admit that they had misled the public about the risk of lead in D.C.’s water.
微信支付 
支付宝支付