【单选题】Which of the following titles best describes the passage as a whole
A．The Vacuum: Its Fluctuations and Decay.
B．The Vacuum: Its Creation and Instability.
C．The Vacuum: A state of Absence.
D．Particles That materialize in the Vacuum.
网考网参考答案：A
网考网解析：
文章主要谈论的是真空、波动和衰减。故应选A。
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