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正确答案A
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正确答案A