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  3. Patients can recall what they hear while under general anesthetic even if they don’t wake up, concludes a new study. Several

Patients can recall what they hear while under general anesthetic even if they don’t wake up, concludes a new study. Several

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问题     Patients can recall what they hear while under general anesthetic even if they don’t wake up, concludes a new study.
    Several studies over the past three decades have reported that people can retain conscious or subconscious memories of thoughts that happened while they were being operated on. But failure by other researchers to confirm such findings has led skeptics to speculate that the patients who remembered these events might briefly have regained consciousness in the course of operations.
    Gitta Lubke, Peter Sebel and colleagues at Emory University in Atlanta measured the depth of anesthesia using bispectral analysis, a technique which measures changes in brainwave pattern in the frontal lobes moment by moment during surgery. "Before this study researchers only took an average measurement over the whole operation," says Lubke.
    Lubke studied 96 trauma patients undergoing emergency surgery. Many of whom were too seriously injured to tolerance full anesthesia. During surgery each patient wore headphones through which a series of 16 words was repeated for 3 minutes each. At the same time bisecteal analysis recorded the depth of anesthesia.
    After the operation Lubke tested the patients by showing them the first three letters of a word such as "limit", and asking them to complete. Patients who had had a word starting with these letters played during surgery — "limit", for example — chose that word an average of 11 per cent more often than patients who had been played a different word list. None of the patients had any conscious memory of hearing the word lists.
    Unconscious priming was strongest for words played when patients were most lightly anaesthetized. But it was statistically significant even when patients were fully anaesthetized when the word was played.
    This finding which will be published in the journal Anesthesiology could mean that operating theatre staff should be more discreet. "What they say during surgery may distress patient afterwards," says Philip Merikle, a psychologist at the University of Waterloo, Ontario.
To test the patients the scientists______.
选项 A、prepared two lists of words
B、used ninety-six headphones for listening
C、conducted the whole experiment for three minutes
D、voiced only the first three letters of sixteen words during surgery
答案B
解析 题干：为了测试病人，科学家们——。本题需要——排除。科学家们准备了不同的单词表，但是并没有说是两个，因此A错误：第四段首句说到，他们研究了96个病人，并且在手术中给他们带上了耳机(headphone)，因此应是96个耳机，故B正确；文中并未说整个实验持续了多长时间，因此C错误；科学家使用机器来播放(play)单词，而不是他们念(voice)单词，故D错误。因此本题的正确答案为B。
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