单项选择题

The author's attitude towards applied bionics is ______.

A．critical
B．approving
C．objective
D．questioning
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单项选择题
Which of the following does this passage mainly discuss
A．The application of bionics.
B．The first "open heart" surgery.
C．The development of the artificial heart.
D．The future of applied bionics.
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 bean 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
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