单项选择题

Which of the following would be appropriate to describe the instruments for surgical operations up until 1960s

A．Traditional.
B．Simple.
C．Remarkable.
D．Basic.
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单项选择题
What do we find after the development of the laser in the 1960s
A．Industrial revolution brought surgery changed greatly.
B．Medical help became available for industrial workers.
C．The study of art went through a complete revolution.
D．Human being's methods in surgery changed greatly.
单项选择题
After the use of the laser beam, surgeons can perform operations which ______.
A．leave the patients with negative effects
B．can. treat only human eye disease
C．do little damage to the patients themselves
D．make the patients need a long time to recover
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