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
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
单项选择题
Marie could hardly recognize the office she went into as ______.
A．she had been there only once
B．Mr. Smith was not in the office
C．nobody was doing any work
D．the office had a new appearance
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