食盐有什么妙用呢?一起来看看吧。从冰箱中取出一块儿冰,放入盛有凉水的杯子中。你能不能不用手接触冰块,而用一条小细绳把冰块取出来呢?和你的朋友们一起做个小实验吧。要想把冰块取出来,首先把绳子横放在冰块上,然后把适量的食盐撒在冰块上,因为食盐能使冰块融化。只要盐撒在冰块上,绳子周围的冰就开始融化。冰在 What is the magic of salt? Let’s have a look. Take a piece of ice out of the freezer and put it in a glass of cold water. Could you use a small string to remove the ice without touching it with your hands? Make a small experiment with your friends. To remove the ice, first place the rope horizontally on ice and then sprinkle the right amount of salt on the ice as salt can melt the ice. As long as salt sprinkles on the ice, the ice around the ropes begins to melt. Ice in