单项选择题

According to the passage, it was Dr. W. Lillehei that _____________.

A．first developed applied bionics
B．was the first to operate on the heart of a patient
C．developed the artificial heart
D．used more sophisticated methods to do "open heart" surgery

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热门试题

单项选择题

By Dr. Clark lived for 112 days ,the author most probably means that _____________.

A．the replacement of Dr. Clark' s heart was a failure
B．there was still a long way to go in applied bionics
C．applied bionics was promising
D．the first artificial heart was most effective

单项选择题

A．visibleB．visualC．invisibleD．vision

A．visible
B．visual
C．invisible
D．vision