Which of the following statements is NOT true about P. V. T. ？A．It is a standard of sleepi
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Which of the following statements is NOT true about P. V. T. ？
A．It is a standard of sleepiness measures.
B．It is an easy but thought-provoking test.
C．It can tell a lapse into sleepiness.
D．It can measure the sustained attention.
请帮忙给出正确答案和分析，谢谢！
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正确答案：B
推断题。根据题干关键词P．V．T．定位到第三、四段。第四段第一句提到，用P．V．T．法检测睡眠虽单调乏味但却简单有效，故[B]与原文意思不符，是正确答案。[A]“它是衡量睡眠充足程度的标准”与第三段第一句意思相符，故排除；[C]“它能辨明是否进入睡眠状态”与第三段第三句意思一致，故排除；[D]“它能够衡量注意力的持续”与第四段第二句意思一致，故排除。