用微波炉煮食物很方便。将冷的或生的食物放入微波炉里,关好炉门,一按开关,食物在微波炉里转上一会儿,就烧热煮熟了。微波炉里没有火,是靠微波,即高频电磁波,作为微波炉的热源。微波是频率为300兆赫到30万兆赫的电磁波。微波炉实际上就是一台微波发生器,它产生的微波频率是2450 Cooking food in a microwave is easy. Place cold or raw food in the microwave oven, close the door, press the switch, turn the food in the microwave for a while, then heat and cook. There is no fire in the microwave oven, it depends on the microwave, namely the high frequency electromagnetic wave, as the heat source of the microwave oven. Microwaves are electromagnetic waves at frequencies of 300 MHz to 30000 MHz. The microwave oven is actually a microwave generator, which produces a microwave frequency of 2450