单项选择题

How did Kathy know how fast she was traveling

A．She looked at the speedometer.
B．It couldn’’t go faster than 50 miles an hour.
C．She would know the speed through what would shake.
D．The police officer told her.
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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 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
The word offset in the second paragraph could be replaced by_______.
A．slip into
B．make up for
C．set up
D．catch up with
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