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

游客2023-11-13  21

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 考查词组辨析。本题首先可排除动词短语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,而心率由加快影响循环系统,in turn表示“又(对别人)做同样的事”,所以为正确答案。又如:He found that Rose had told. Jack’s sister, and she in turn had told Jack. (他发现罗斯已经告诉了杰克的姐姐,而她又告诉了杰克。)
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