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2017半岛星空体育·(中国)官方网站英语阅读模拟题（一）

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  聚英半岛星空体育·(中国)官方网站信息网整理了2017半岛星空体育·(中国)官方网站英语阅读模拟题（一），部分详情如下：

  阅读是半岛星空体育·(中国)官方网站英语的重头戏，也是相对难搞的一个题型。下面分享一些半岛星空体育·(中国)官方网站英语阅读模拟练习题，同学们可以熟悉下题感！

  At 18， Ashanthi DeSilva of suburban Cleveland is a living symbol of one of the great intellectual achievements of the 20th century. Born with an extremely rare and usually fatal disorder that left her without a functioning immune system (the “bubble-boy disease，” named after an earlier victim who was kept alive for years in a sterile plastic tent)， she was treated beginning in 1990 with a revolutionary new therapy that sought to correct the defect at its very source， in the genes of her white blood cells. It worked. Although her last gene-therapy treatment was in 1992， she is completely healthy with normal immune function， according to one of the doctors who treated her， W. French Anderson of the University of Southern California. Researchers have long dreamed of treating diseases from hemophilia to cancer by replacing mutant genes with normal ones. And the dreaming may continue for decades more. “There will be a gene-based treatment for essentially every disease，” Anderson says， “within 50 years.”

  It's not entirely clear why medicine has been so slow to build on Anderson's early success. The National Institutes of Health budget office estimates it will spend $432 million on gene-therapy research in 2005， and there is no shortage of promising leads. The therapeutic genes are usually delivered through viruses that don't cause human disease. “The virus is sort of like a Trojan horse，” says Ronald Crystal of New York Presbyterian/Weill Cornell Medical College. “The cargo is the gene.”

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