First of all, food can't be heated without water. Water is composed of "polar molecules", but besides water, there are many things that can absorb microwaves, such as graphite and carbon powder. Therefore, as long as what is put in is composed of "polar molecules", it can be heated, and water is only a typical representative.

The microwave oven is actually a small microwave oven. When the microwave oven is heated, it is actually the magnetron that converts electric energy into microwave and sends it into the microwave cavity through the waveguide. As long as the things placed in the microwave cavity are composed of "polar molecules", they can absorb microwaves and convert them into heat energy inside the object.

Second, 1, avoid heating the meat until it is half cooked before heating it in the microwave oven: because bacteria will still grow in the half cooked food, because the time is too short, it is impossible to kill all the bacteria when heating it in the microwave oven for the second time. Frozen meat must be thawed in the microwave before it can be heated to maturity.

2. Don't freeze the meat thawed in the microwave oven again: Because the meat thawed in the microwave oven has actually been heated at a low temperature, bacteria can reproduce at this temperature. Although freezing can prevent its reproduction, it can't kill living bacteria. Meat that has been thawed in the microwave oven must be heated until it is completely cooked if it is frozen in the refrigerator again.

3, avoid fried food: because high-temperature oil will splash and cause fire. When there is an accidental fire in the furnace, don't open the door, turn off the power first, and then open the door to cool down after the fire is extinguished.

4. Avoid overtime heating: If food is thawed or heated in the microwave oven, if you forget to take it out, if it takes more than 2 hours, you should throw it away to avoid food poisoning.

5. Avoid using ordinary plastic containers: use special microwave utensils to hold food and put it in the microwave oven for heating. First, hot food will deform plastic containers. Second, ordinary plastics will release toxic substances, pollute food and endanger human health.

6. Avoid using metal utensils: When iron, aluminum, stainless steel, enamel and other utensils are put into the furnace, electric sparks will be generated when the microwave oven is heated, which will not only damage the furnace body but also heat unfamiliar food.

7. Avoid using closed containers: wide-mouth containers should be used when heating liquids, because the heat generated by heating food in closed containers is not easy to dissipate, which makes the pressure in the containers too high and easily leads to blasting accidents. Even when cooking food with shells, you should pierce the shells with needles or chopsticks in advance to avoid bursting, splashing and polluting the furnace wall after heating, or splashing and injuring people.