The work class is one of my favorite classes. Work can not only exercise our practical abilities, but more importantly, it can cultivate our observation, thinking and cooperation skills.
This semester, I learned a lot of professional working class skills. The book cover allows me to put my favorite reading book in a colorful "camouflage uniform". Learning about timekeeping familiarized me with electronic watches, which I had always known. When it comes to cold drinks, people salivate. I didn't expect that I could also learn about work classes. It's perfect. It is common knowledge when it comes to foot washing, I know that the water temperature is generally between 37°C and 45°C, and that it is not advisable to wash your feet half an hour before or after meals. In origami, I made little rabbits, birds and grenouilles. It was very interesting ! When I make sweater pans, I know that some colors can turn into another color when mixed. It's incredible ! Among the clever uses of paper packaging, I didn't expect that cardboard could also serve as a periscope!
What interests me the most and disappoints me the most is growing spinach. At first, after a week of asking, my father finally bought me some seeds. After lunch we went to the seed station and bought some spinach seeds. We planted them in flower pots, watered them and fertilized them. A week later, the seeds germinated... In the end, one pot died and the other pot grew vigorously. I think there are two reasons why I died: first, I didn't manage it well, second, I planted it too densely. I will remember this experience forever.enir.
Working Class this semester has given me endless aftertaste, and I'm looking forward to more exciting content next semester!
The scientific name for “formaldehyde” is formalin, which is a preservative used to preserve corpses in medicine. If you consume a small amount of formaldehyde, symptoms such as dizziness, vomiting, and diarrhea will occur. Excessive consumption can also cause coma, shock and even cancer. Formalin is a powerful carcinogen.
Identification of formaldehyde-expanded aquatic products: 1. Look. Although the appearance of formaldehyde-soaked seafood is bright and pleasing to the eye, its color is reddish. 2. Odor. A pungent odor will be felt, masking the inherent odor of the food. 3. Touch. Seafood soaked in formaldehyde, especially sea cucumbers, is hard and brittle to the touch, making itwhich makes them brittle when pinched. 4. Taste it and you will feel an astringent sensation and lack of umami flavor in your mouth. However, these methods cannot completely determine whether formaldehyde is used in aquatic products. If the amount of formaldehyde is low or the seafood has been processed and seasonings added, it will be difficult to distinguish. Here's a simple chemical method: drop the magenta sulfuric acid solution into the food solution covered with water. If the solution turns blue-purple, you can confirm that the soaking solution contains formaldehyde.