A Complete Collection of 100000 Whys
Fav十万个为什么
为什么微波炉加热馒头会变硬？
简单的摘要：微波炉加热馒头会变硬的原因主要是微波加热导致水分流失、加热不均匀以及馒头表皮失水变干。
1、微波加热导致水分流失：微波炉通过高频电磁波使食物中的水分子高速运动产生热量，这一过程会加速馒头内部水分的蒸发，导致馒头变干变硬。
2、加热不均匀：微波炉加热是从食物内部开始的，但馒头内部结构较为致密，微波可能无法均匀穿透，导致某些部分过热而失水，从而变硬。
3、馒头表皮失水变干：馒头表皮在微波加热过程中容易迅速失水，形成一层硬壳，这也是馒头变硬的重要原因之一。
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