Dormitory XX says honey is bee s, solve!

It's not excrement, it's spit out when the bees return to the nest after collecting nectar. The following **, the landlord will take a look for himself: Honey is the honey made in the hive by insect bees from the nectar collected from the flowers of flowering plants.

Bees take nectar or secretions with a water content of about 80% from the flowers of plants, store them in their second stomach, ferment for 30 minutes under the action of invertase in the body, return to the hive and spit out, the temperature in the hive is often maintained at about 35, after a period of time, the water evaporates to become honey with a moisture content of less than 20%, stored in the nest hole, and sealed with beeswax. In addition to glucose and fructose, honey also contains various vitamins, minerals, and amino acids. 1 kg of honey contains 2940 calories.

Honey is a supersaturated solution of sugar, which crystallizes at low temperatures, and it is glucose that produces crystals, and the part that does not crystallize is mainly fructose.

Honey is the main product of bees, and it is a sweet and viscous, transparent or translucent liquid. Honey is mainly used in nectar, followed by nectar and honeydew. Nectar is the secretion of nectar glands inside plant flowers, manna is the excrement of aphids, leafhoppers, etc., and honeydew is the secretion of nectar glands outside plant flowers.

Bees use tongue straws to suck the sweet juice secreted by the nectar glands and sap of plants or the honey tubes of aphids and leafhoppers, mix saliva with the mouthparts of bees and temporarily store them in honey sacs. Honey is used by bees to suck nectar from the flower apparatus and nectar glands of nectar source plants with a tongue straw, bring it back to the hive, spit out the nectar from the honey sac into the hive, and then inhale and spit out repeatedly through the bees, and store the nectar mixed with invertase secreted by the honey sac in the hive. Under the action of enzymes, the polysaccharides in the nectar are decomposed into glucose and fructose, the water is reduced to about 20, and the mature honey is basically formed.

Physical properties of honey: Pure high-quality fresh and ripe honey is a viscous, transparent or translucent gelatinous liquid with a sweet taste and a strong aroma. Inferior honey often has a bitter, astringent, sour or foul taste.

If the temperature is lower than 10 or left for too long, it is easy to transform into crystallization to different degrees. Different types of nectar sources have different physical properties. 【The main ingredient of honey】 Honey has endured for thousands of years, which is related to the many unique nutrients that honey has.

The main components of honey are: glucose and fructose, which can be directly absorbed by the human body, about 65 80%; Various amino acids, including 8 essential amino acids that cannot be synthesized by the human body, about; More than 20 kinds of minerals contained in almost the same proportion as human serum, about; More than 20 kinds of vitamins that promote human growth and metabolism; A variety of active enzymes.

You don't need to draw a picture, it's actually very easy to understand...

Let's take it one step at a time.

We look at the whole as one.

The first time I went backwards a quarter].

At this point, there are only three-quarters of the "pure" honey in the bottle, and three-quarters divided by one equals three-quarters, so the concentration of honey (i.e. the fraction of pure honey out of the total honey) is three-quarters.

Top up with water] At this time three-quarters is honey and the remaining three-quarters is water.

The second pour out three-quarters].

Pour out three-quarters of the honey and add water, i.e. the remaining quarter of the honey with water.

Multiplying one-quarter by three-quarters (the concentration of honey) at this point equals three-sixteenths.

Three-sixteenths is the amount of honey.

Fill up with water] honey is still three-sixteenth, and water accounts for thirteen-sixteenth.

The third pour out three-quarters].

Pour out three-quarters and leave one-quarter.

One-quarter multiplied by three-sixteenths (the concentration of the last honey) is equal to three-fourths, which is the amount of honey.

Fill up with water] honey is still three-sixths, and water is 1 minus three-sixths equals sixty-fourths sixty-one.

Answer] 61/64.

The answer should be right, anyway, the way of thinking must be like this, think about it for yourself.

61/64 (61 64).

Solution process: first add a quarter of water, then pour out three-quarters of the mixture, the mixture is still a quarter, the original mixture is only a quarter of water, now only one-sixteenth of water is left, after the first full up is 1 16 + 3 4 = 13 16. Then pour out three-quarters, that is, the remaining quarter, 13 16 1 4 = 13 64, and then fill up so it is 13 64 + 3 4 = 61 64.

Do you understand?

1) Social base.

2) Defensive cautious.

3) Breeding.

4) Attack.