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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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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Which of the following is the main point of the passage
A．Culture shock on friendship.
B．Americans' friendship.
C．Difference between American and Chinese friendship.
D．Similarity of American friendship to Chinese friendship.
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