Answer: Because the pressure cooker increases the pressure and the boiling point of water, beef is cooked faster.

2. On New Year's Eve, the windows at home were covered with steam. Why is this?

A: Because the room temperature is high and the glass is cold. The hot air in the room condenses into water droplets.

3. After eating, which hormones will increase in the human body? A: Insulin.

4. What is the function of this hormone? A: It can lower the blood sugar content.

5: When drinking soup, everyone thought the soup was too weak, so they added some salt. How much has it increased?

A: mass fraction of salt.

6. My brother was scalded by spilled oil when he was drinking soup, and his hand shrank back immediately. What is this reflection?

A: Unconditional reflex.

7. What are the benefits of this kind of reflection?

A: It's fast, and it can get people out of danger faster without going through the brain.

8. Where did the pain after my brother was burned happen?

A: The brain.

9: Excuse me, how are the festive lanterns connected on the tree? A: Hybrid connection.

10: What are the advantages of hybrid connection? Answer: Small bulbs can protect other bulbs, and there is no danger of excessive main current.

1 1: What are the disadvantages of mashup? A: The connection is very complicated.

12: The Chinese New Year is coming, and everyone is very excited. My brother can't sleep. Why?

A: Because of the secretion of thyroid hormone.

13: What does this hormone do?

Answer: It can promote metabolism in the body and improve the excitability of the nervous system.

14: What are the disadvantages of this hormone? A: Let adults get hyperthyroidism and children get dementia.

Grandma spilled some salt in the soup. Why did the salt suddenly disappear?

A: Because salt dissolves into molecules, it is invisible to the human eye.

16: When eating, my brother put the hot pot cover on the table, and it was difficult to pick it up after a while. Why? Answer: Because the air in the pot cover is heated and expanded, the air pressure becomes lower, and the atmospheric pressure presses the pot cover on the table.

17: the pressure cooker is called. Why? Answer: The air pressure in the pot is higher than the gravity of the throttle valve. Push it up, air will be ejected from the hole, and the pressure cooker will keep screaming.

18: What are the advantages of the pressure cooker's air limiting valve? Answer: To prevent explosion due to excessive air pressure in the pot.

19: On New Year's Eve, there was a strong wind outside the door. What is the wind?

A: Wind is the horizontal flow of air.

20: Why does the wind make people feel cold? A: When the wind blows, the water on the human body evaporates and takes away the heat, so people feel cold.

You come from No.6 Middle School, right? I've thought about this topic for a long time. Give me more.