[单项选择]

Artificial hearts have long been the stuff of science fiction. In "Robocop", snazzy cardiac devices are made by Yamaha and Jensen, and in "Star Trek", Jean-Luc Picard, captain of the Enterprise, has one implanted in the year 2328. In the present day, however, their history has been more chequered. The first serious attempt to build one happened in the 1980s, when Jarvik-7, made by Robert Jarvik, a surgeon at the University of Utah, captured the world’s attention. But Jarvik-7 was a complicated affair that needed to be connected’ via tubes to machines outside the body. The patient could not go home, nor even turn around in bed. Various other designs have been tried since, but all were seen as temporary expedients intended to tide a patient over until the real thing became available from a human donor.
That may be about to change. This week, America’s Food and Drug Administration gave its approval to a new type of artificial heart made
A. The Stuff of Science Fiction
B. The History of Artificial Hearts
C. The Change of Human Donor
D. A Promising New Artificial Heart

Artificial hearts have long been the stuff of science fiction. In "Robocop", snazzy cardiac devices are made by Yamaha and Jensen, and in "Star Trek", Jean-Luc Picard, captain of the Enterprise, has one implanted in the year 2328. In the present day, however, their history has been more chequered. The first serious attempt to build one happened in the 1980s, when Jarvik-7, made by Robert Jarvik, a surgeon at the University of Utah, captured the world’s attention. But Jarvik-7 was a complicated affair that needed to be connected’ via tubes to machines outside the body. The patient could not go home, nor even turn around in bed. Various other designs have been tried since, but all were seen as temporary expedients intended to tide a patient over until the real thing became available from a human donor.
That may be about to change. This week, America’s Food and Drug Administration gave its approval to a new type of artificial heart made
A. depict the long history of artificial hearts in science fiction
B. enumerate artificial hearts of all sorts on sale
C. provide background for the discussion of artificial hearts
D. emphasize the great efforts made by Yamaha and Jensen in the development Of artificial hearts