2. 外语
  3. Most computer users have symptoms of CVS because of ______. Clots can form when ______.

Most computer users have symptoms of CVS because of ______. Clots can form when ______.

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问题 Most computer users have symptoms of CVS because of ______.
Clots can form when ______.
选项 A、blood supply slows or stops
B、blood migrates to the lungs
C、blood is in deep veins
D、blood causes a pulmonary embolism
答案A
解析 根据题干信息词clots can form定位到第三个小标题下的第三句Clots can form when blood supply slows or stops, such as in a period of prolonged immobility，即：当血液供应放慢或者停止供应的时候，例如长时间的不移动，就会形成血栓，故答案为A。
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