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Anonymous users2024-01-24A. Opening the exhaust fan may produce sparks, resulting in the explosion of leaked natural gas, so it is unreasonable;
B. Because the density of carbon dioxide is greater than that of air, a large amount of carbon dioxide is easy to accumulate at the bottom of the dry well, so the light test must be done before entering the dry deep well;
C. The oil in the oil pan is burning on fire, and the lid can isolate the oil from the air, so it can extinguish the fire;
D. The gas that can extinguish the burning wooden strip is not necessarily carbon dioxide, and nitrogen cannot support combustion, and the burning wooden strip can also be extinguished when it reaches into the gas collection cylinder containing nitrogen, so the bottle is not necessarily carbon dioxide;
Therefore, AD is chosen
There are many chemicals that can be counted in the kitchen, but they are easier to find, can react, and the reaction is relatively obvious, and baking soda and vinegar, baking soda is sodium bicarbonate, vinegar is acetic acid (acetic acid), and the two contact produces a large amount of foaming (carbon dioxide), which is heavier than air, and can be extinguished by trying to light matches, candles, etc.
We have one too, but not in the toilet. They would sleep for a while and then wake up in the middle of the night to study because they didn't think it would affect anyone else.
According to my thinking, cooking is the same as experimenting, haha. The difference between them is that one is to see and the other is to eat. >>>More
I don't know much about building materials. If you want any kind of knowledge, you can look it up on some of these websites.
It should be that the oil smoke during the stir-fry is smoked into the range hood, and the small oil droplets in the air adhere to the inner wall of the range hood, and then more and more, and finally become an oil layer, which remains.