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【单选题】
Cold air causes the arteries around the heart to
constrict.
A become rigid
B contract
C close
D die
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根据网考网移动考试中心的统计,该试题:
1%
的考友选择了A选项
82%
的考友选择了B选项
10%
的考友选择了C选项
7%
的考友选择了D选项
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