Tip 1: In a dark place, you can judge whether there is a road ahead according to the sound of the stone returning.
Little knowledge 2: No wonder doctors often use two forefingers to tie the line when doing surgery, which will leave traces on the forefinger after a long time.
Tip 3: If you run in rainy days, the clothes behind you will basically not get wet. It can be inferred whether a person is running in the rain.
Tip 4: Sodium hydroxide that absorbs air is highly toxic.
Tip 5: A pistol will generate a lot of heat when it is fired. If you get close enough, it will cause burn marks on the wound.
Tip 6: Don't eat irritating things just after tooth extraction.
Tip 7: You can use the head reflector of an old flashlight to make a compass.
Tip 8: If a person dies of drowning, his ears will ooze a small amount of blood, which is caused by underwater pressure.
Tip 9: The puffer fish is very toxic and can kill people instantly.
Tip 10: Your face burns and your body stops sweating, which is probably a sign of heatstroke.
Tip 1 1: Long-haired cats are very afraid of heat and need to be placed in a suitable temperature environment. Air conditioning is a must.
Secret 12: Hard liquor can cure colds, whisky, tempt fate and so on.
Little knowledge 13: The human body will gradually become stiff, but it will also become soft in a certain period of time.
Prompt 14: organophosphorus chemicals are less toxic and will not cause death in most cases.
Prompt 15: lime will generate high temperature when it meets water, which is a great threat to life safety.
Tip 16: the damage caused by ice cones is much greater than you think, but it is also difficult to find.
It is suggested that 17: Sodium sulfide can relieve the toxicity of methyl hydrogen.
Prompt 18: Aconitine is a highly toxic substance, which exists in plants such as Radix Aconiti, Radix Aconiti Kusnezoffii and Radix Aconiti Lateralis. Please eat it carefully.
Skill 19: Those who have slight scars on their left hand and calluses on their right hand are probably people who often practice kendo, because they will accidentally hurt themselves when closing the knife.
Tip 20: People who often come into contact with pigments will inevitably leave stains on their hands.
It is suggested that 2 1: the components in black tea can neutralize toxins and have limitations.
Tip 22: Every different flower has a different meaning, the meaning of flower language.
Tip 23: When the clock reaches 6.30, if the hour hand and minute hand overlap, then the clock should have been tampered with.
Tip 24: Two detergents with different acidity will produce highly toxic gas together, which has also appeared in TV series.
Tip 25: The limitation of prosecution for Japanese cases is fifteen years, and there is no chance after that.
Tip 26: Plants can absorb formaldehyde, but they are also carriers of formaldehyde.
Tip 27: People who practice the horizontal bar for a long time will have special calluses on their legs.
Tip 28: Luminol reagent can show clean blood.
Tip 29: Ice slides not because of ice, but because of melted water, resulting in reduced friction.
The above is purely a personal opinion.