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  3. Just seven years ago, the Jarvik-7 artificial heart was being cheered as the

Just seven years ago, the Jarvik-7 artificial heart was being cheered as the

游客2023-07-17  23
问题     Just seven years ago, the Jarvik-7 artificial heart was being cheered as the model of human creativeness. The sight of Barney Clark—alive and conscious after trading his diseased heart for a metal-and-plastic pump— convinced the press, the public and many doctors that the future had arrived. It hadn’t. After monitoring production of the Jarvik-7, and reviewing its effects on the 150 or so patients (most of whom got the device as a temporary measure) the U.S. Food and Drug Administration concluded that the machine was doing more to endanger lives than to save them. Last week the agency cancelled its earlier approval, effectively banning (禁止) the device.
    The recall may hurt Symbion Inc., maker of the Jarvik-7, but it won’t end the request for an artificial heart. One problem with the banned model is that the tubes connecting it to an external power source created a passage for infection. Inventors are now working on new devices that would be fully placed, along with a tiny power pack, in the patient’s chest. The first sample products aren’t expected for another 10 of 20 years. But some people are already worrying that they’ll work—and that America’s overextended health-care programs will lose a precious $2.5 billion to $5 billion a year providing them for a relatively few dying patients. If such expenditures (开支) cut into funding for more basic care, the net effect could actually be a decline in the nation’s health. [br] From the passage we know that Symbion Inc. ______.
选项 A、has been banned by the government from producing artificial hearts
B、will review the effects of artificial hearts before designing new models
C、may continue to work on new models of reliable artificial hearts
D、can make new models of artificial hearts available on the market in 10 to 20 years
答案 C
解析 文章第2段第1句提到，要求生产人造心脏的Symbion公司召回其销售的人造心脏，这对该公司来说或许是一种损失，但这一禁令不会终结人们对人造心脏的需求。从这一句可推断出应选C。原文只提到政府禁止Jarvik-7这种型号的人造心脏，A把范围扩大到了所有的人造心脏；B在原文中并未提及；D说的对象不是Symbion公司，也可排除。
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