A.a milestone in the artificial heart development
B.still in the experimental stage
C.an implantable, permanent artificial heart
D.unavailable to all those Americans waiting for donor hearts
A.the most expensive mechanical heart
B.a mechanical heart used in the 1980s
C.as advanced as A biocor
D.replacing A biocor
开始考试点击查看答案A.could not afford a donor heart
B.was said to be in a good condition the next day after the operation
C.died two month’s after the heart implantation
D.was reluctant to release his or her personal information
开始考试点击查看答案A.was made of titanium and pump
B.had brought the patient to the brink of death
C.did not need to get power from outside the body
D.was invented by two surgeous from university of Louisville
开始考试点击查看答案A.continuable
B.affordable
C.available
D.Persistent
开始考试点击查看答案A.Most women take walking as their only recreational activity.
B.The study aims to track the health conditions of its subjects.
C.Walking was the only recreational acitivity for about half of the women
D.Irregular walking increased the risk of breast cancer in post-menopausal women
开始考试点击查看答案A.saved the lives of about 2100 Americans the year before the report
B.will be replaced by self-contained artificial hearts sooner or later
C.are more popular and cheaper than self-contained artificial hearts
D.can help patients survive less than 15 years if they are in good transplant.
开始考试点击查看答案注册安全工程师注册安全工程师安全生产技术2011年安全工程师
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