标签：scans 相关文章
Doctors use X-rays to view internal organs, obtain clear images of possible disease and to treat cancer. For years radiation has been used to save lives, but there is growing concern that some patients are getting more than they ask for when they und
VOA标准英语2010年(一月)
He was President Bush's third press secretary, brought in to revitalize a second term administration increasingly unpopular and off-message. Tony Snow brought to the job the credentials of a journalist and the polish of a TV star. Tony already knows
万花筒2008年
Mental Stimulation Might Cut Dementia Risk People who engage in mentally-stimulating activities over a lifetime have lower levels of a protein in the brain associated with Alzheimer's disease, a new study finds. That supports other research which sug
VOA标准英语2012年(二月)
Have you ever heard that we humans use only ten percent of our brains? This oft-quoted myth holds a certain appeal because if it were true, then we could instantly become ten times more intelligent just by firing up that sleepy majority of the brain!
初学者听力文摘精选
Joe is a sale associate. He has a lot of duties. He helps customers find things. Customers can be annoying. They always think they're right. Joe always has to be nice to them. Joe also answers phone calls. People ask about products in the store. Joe
英语第5级听力-English Level 5
Do We Only Use 10% Of Our Brains? Have you ever heard that we humans use only ten percent of our brains? This oft-quoted myth holds a certain appeal because if it were true, then we could instantly become ten times more intelligent just by firing up
英语听力文摘 English Digest
King Tut's Tough Life New analysis of the mummy of King Tut, published in the Journal of the American Medical Association, shows that the boy king had severe bone disease and malaria. Christopher Intagliata reports The Journal of the American Medical
60秒科学
August 18, 2005—Call it x-ray vision for archaeologists. High- tech scans and computer modeling have offered scientists a noninvasive glimpse inside the delicate burial case of a millennia- old mumm
阅读空间
By Mike O'Sullivan San Francisco 10 April 2006 April 18, San Franciscans will remember one of the worst natural disasters in U.S. history, the Great Earthquake of 1906. Local officials say it is a tim
2006年VOA标准英语（四月）
HEALTH REPORT - Studies Show Healthy Living May Lower Risk of Alzheimer's Disease By Cynthia Kirk Broadcast: Wednesday, July 20, 2005 An image of a brain suffering from Alzheimer's disease I'm Shep O'
健康与经济
Scientists at the U.S. Food and Drug Administration disagree about the risks from CT scans given during virtual colonoscopies. Doctors who favor the procedure say it is less invasive and more cost effective than a conventional colonoscopy. Those agai
VOA标准英语2010年(四)月