"室内水管破裂的主要原因是温度太低,里面的水结冰,然后在温度升高的过程中膨胀而造成水管破裂.'
室内水管破裂的主要原因是温度太低,里面的水结冰的过程中体积膨胀而造成水管破裂。同样的水分子下 冰的体积比水大. :)
Polling your leg, looks like mainland's education system is not as inferior as Hong Kong's educational system.