The position which the life preserver will support a person who jumps or falls into the water is the most important, as is its t

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问题 The position which the life preserver will support a person who jumps or falls into the water is the most important, as is its tendency to turn the wearer in the water from a face-down position to an upright or slightly backward position, with his face clear of the water, even when the wearer is exhausted or unconscious.

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答案定语从句的关系词误用,应把which改为where或者在which前加上in。

解析 此处定语从句的先行词是position,而定语从句中的引导词在句子中作状语,因此需要使用关系副词where,或者in which。
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