2018年12月英语四级阅读理解：人工心脏

英语自学网

今天英语四六级考试网为考生们提供英语四级阅读理解、四级阅读、英语四级阅技巧等，希望能为考生们带来帮助。今日为大家分享2018年12月英语四级阅读理解：人工心脏，请看下面的文章分享。
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 mode is that the tubes connecting it to an external power source createda passage for infection. Inventors are now working on new devices that would be fully placed, along with atiny power pack, in the patient’s chest. The first sample products aren’t expected for another 10 or 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.
练习题：
Choose correct answers to the question:
1. According to the passage, the Jarvik-7 artificial heart proved to be _____.
A. a technical failure
B. a technical wonder
C. a good life-saver
D. an effective means to treat heart disease
2. From the passage we know that Symbion Inc. _____.
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
3. The new models of artificial hearts are expected ______.
A. to have a working life of 10 or 20 years
B. to be set fully in the patient's chest
C. to be equipped with an external power source
D. to create a new passage for infection