Too much salt is known to contribute to hypertension, ______is a factor in half the deaths in the U. S. each year.

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问题 Too much salt is known to contribute to hypertension, ______is a factor in half the deaths in the U. S. each year.

选项 A、what
B、that
C、which
D、this

答案C

解析句意：摄人太多盐被认为会导致高血压；每年美国的死亡人数中一半都起因于高血压。由横线前的逗号可知此处为which引导的非限制性定语从句。

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C类竞赛（非英语专业本科）

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