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  3. Worriers, beware: all that worrying may be for nothing. Anxiety has long been【C1】______as a symptom of super-awareness and sensi

Worriers, beware: all that worrying may be for nothing. Anxiety has long been【C1】______as a symptom of super-awareness and sensi

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问题     Worriers, beware: all that worrying may be for nothing. Anxiety has long been【C1】______as a symptom of super-awareness and sensitivity to clanger, but a study published in Biological Psychology turns that logic on its【C2】______.
    Tahl Frenkel, a graduate student in psychology at Tel Aviv University, asked 17 students who had anxious personalities and 22 students who were more cool-headed to【C3】______when they detected fear in a series of increasingly frightened faces. As expected, the anxious group【C4】______up before their calmer【C5】______. The twist,【C6】______, came from the volunteers’ brain activity, recorded with electrodes on each student’s scalp. The brains of anxious subjects barely responded to the images【C7】______the frightened face had reached a certain obvious【C8】______, at which point their brains leapt into action【C9】______caught off guard.【C10】______nonanxious respondents showed increasing brain activity【C11】______in the exercise, which【C12】______up subtly with each increasingly fearful face. Although their【C13】______response was slower, their brain activity suggests that the cool-headed subjects【C14】______subtle differences in the images more quickly.
    The result implies that worriers are less【C15】______potential danger【C16】______the common theory that anxious individuals are super-alert. Frenkel believes that worriers’ low sensitivity to external warning signs causes them to be【C17】______frequently by the【C18】______sudden appearance of threats, which leaves them in a state of chronic stress. The brain activity in nonanxious subjects, Frenkel explains, may be【C19】______of an "early subconscious【C20】______mechanism," which keeps them cool, calm and collected.
【C19】
选项 A、source
B、requirement
C、evidence
D、assessment
答案C
解析 本题考查句内语义+名词熟词辟义。
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