单选题：The appearance of the laser in the l960s results in_____.

题目分类：英语四级
题目类型：单选题
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题目内容：

The appearance of the laser in the l960s results in_____. A．a complete revolution in the，science of surgical techniques
B．an end to pain brought by all diseases
C．medical help accessible to more common people
D．complete changes in man’s approach to surgery

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答案解析：

Passage One Questions are based on the following passage． T

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分类：英语四级题型：单选题

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分类：英语四级题型：单选题

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分类：英语四级题型：单选题

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分类：英语四级题型：单选题