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单选题
The best title of the text might be ______.
A

The Laser: A Scientific & Technological Wonder

B

The Laser: A Powerful Tool for Communications

C

The Laser: A Solution to Life-Saving Problems

D

The Laser: A Multimillion Dollar Invention

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参考解析
解析：
主旨题。从文章的整体意思来看，作者在这篇文章里面描述了激光作为科技发展的产物在通讯、医药等领域起到巨大作用。可以说激光是现代科技的一个奇迹。其他概括不够全面，或有失偏颇。故正确的答案为A。
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