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  3. Because a headache is not a disease, it will not cause serious influence on our daily life. Both the expansion and constriction

Because a headache is not a disease, it will not cause serious influence on our daily life. Both the expansion and constriction

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问题 Because a headache is not a disease, it will not cause serious influence on our daily life.
Both the expansion and constriction of blood vessels are the possible cause of a vascular headache.
选项 A、Y
B、N
C、NG
答案A
解析 先由题干中的vascular headache判定这是属于第一类头痛的内容；再由题干中的expansion and constriction定位到文章第2段第3、4句One theory about migraine headaches is that they occur when the blood vessels in the head expand…Another theory is that they result from the blood vessels constricting…accompany or precede a migraine headache. migraine headache是题干中vascular headache的一种；题干中的the expansion of blood vessels与原文中的the blood vessels in the head expand属同义转述；同样，the constriction of blood vessels对应the blood vessels constricting。所以题干与原文的意思表述一致。
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