1, crude oil is bought from the supermarket and has been cooled. There are two kinds of crude oil, vegetable oil and animal oil. Only peanut oil and sesame oil can be eaten raw.

2. Cooked oil refers to cooked oil when it is poured into a pot and the temperature is so high that the oil starts to emit a lot of smoke. Cooked oil is hot oil, and it is cooked oil when heated to 30% to 40%. When cooking, the oil is heated to 70% or 80% so that vegetables can be put in. If the cooking oil bought from the supermarket is heated, first, feel it by hand near the center of the pot. Second, watch the oil boil, don't wait for the pot to smoke.

Extended data:

Purchasing method of edible oil:

First, look at the color. Generally speaking, the higher the degree of refining, the lighter the color of oil. Of course, all kinds of vegetable oils will have a unique color, and it is impossible and unnecessary to refine them to no color.

Second, it depends on transparency. We should choose clear and transparent oil. The more transparent, the better.

Third, you should smell tasteless. Take a drop or two of oil and put it in your palm. After the hands are rubbed and heated, no peculiar smell (pungent or irritating) can be smelled. Don't buy it if it smells.

References:

Baidu encyclopedia-edible oil