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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单项选择题
The rapid development of laser techniques has meant that ______.
A．surgery is likely to improve considerably
B．in another ten years we shall be able to cure cancer
C．in future all the diseases can certainly be cured
D．operations will be performed more complicatedly in the future
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.
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