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Fav十万个为什么
为什么眼泪水是咸的？
眼泪水是咸的，主要是因为泪液中含有的无机盐成分、泪腺分泌的生理盐水以及眼泪通过泪道吸收的盐分，具体如下：
1、无机盐成分：泪液中包含了溶解的盐分，例如钠、钾、钙和镁等电解质，这些成分赋予了眼泪咸味。
2、生理盐水：泪腺分泌的泪液本质上是稍带咸味的生理盐水，用以保持眼睛的湿润和清洁。
3、泪道吸收：眼泪在流经泪道时，也会吸收一些盐分，这进一步增加了眼泪的咸度。
总结：眼泪水是咸的，主要是因为泪液中的无机盐成分、泪腺分泌的生理盐水以及眼泪通过泪道吸收的盐分。
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