2. 职称英语
  3. Tests have proved that caffeine affects the body by increasing the heart rate an

Tests have proved that caffeine affects the body by increasing the heart rate an

游客2025-04-08  13
问题 Tests have proved that caffeine affects the body by increasing the heart rate and rhythm, which______affects the circulatory system.
选项 A、in turn
B、in return
C、turn back
D、as a result
答案 A
解析 介词词组辨析。本题可先排除动词短语turn back“往回走，折返”；而in return表示“作为回报”，用在这里也不对：as a result意为“结果”，句中并没有原因出现，所以不合适。本题谈论咖啡因使心率加快，而心率加快影响循环系统，in turn表示“又(对别人)做同样的事”。故答案为A。
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