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After a plane crash, people on the ground will always do everything possible to find the "black box of the flight data recorder" that fell from the plane and decipher the cause of the flight accident. So, do you know what a "black box of the flight data recorder" is? Why are there "black boxes of the flight data recorder" on planes? What color is it? Below, the author will answer the question for you. Question 1: What is the "black box of the flight data recorder" on the plane? The long tail of "black box of the flight data recorder" (that is, the popular name) is called "flight information recording system", which is one of the electronic recording devices dedicated to aircraft. There are usually two "black boxes of the flight data recorder" on a plane. Cabin sound recorder and flight data recorder, respectively. 1. Cabin Sound Recorder This is a tape recorder. It generally only retains the sound for the 30 minutes

Today, May 8, 2022, the second Sunday in May, you should all know what day it is, right? It is the day to thank mothers - Mother's Day. So, do you all know the origin, development and related legends of Mother's Day? Do all countries have the same Mother's Day time? Question 1: The origin, development and related legends of Mother's Day Mother's Day isn't just a customary date, it has a source. 1. The original Mother's Day originated from Greece According to sources, Mother's Day originated in Greece, when the ancient Greeks would fix this day to pay homage to Hera, the mother of the gods in Greek mythology. At the time and local, its meaning was "remember our mother and her greatness, and inherit Chinese virtues". Then, when it spread to the United Kingdom, it was already "the middle of the 17th century", and the locals called the fourth Sunday of Lent "Mother's Day". On this day, young people will go home and give thei

The Dragon Boat Festival, also known as the Dragon Boat Festival (“Zhengwu Festival”) or Dumpling Festival or Double Five Festival, is celebrated with dragon boat racing and rice dumpling making. It is one of the four traditional festivals in China, alongside the Spring Festival, Qingming Festival and Mid-Autumn Festival. Besides China, many other Asian countries also celebrate this festival. In Malaysia, Indonesia, Singapore and Taiwan, it is known as the Bak Chang Festival ("Dumpling Festival"). The Dragon Boat Festival in 2022 is June 3 (Friday). China will have 3 public holidays from Friday (June 3) to Sunday (June 5).

The Dragon Boat Festival is a traditional festival. From ancient times to the present, people will celebrate the festival on the fifth day of the fifth lunar month. However, does everyone know why this festival was established? Some people say that the Dragon Boat Festival is set up to ward off evil spirits because May is an unfortunate month, and some people say that it is to commemorate the death of Qu Yuan. Which statement is correct? There are many opinions, so let's take a look at the reasons for the establishment of the Dragon Boat Festival! The Dragon Boat Festival, also known as the "Chongyang Festival", falls on the fifth day of the fifth lunar month in the Chinese lunar calendar. It is understood that the more traditional holidays in China are the lunar calendar, and the Dragon Boat Festival is no exception, so the dates on the Gregorian calendar vary every year. Generally speaking, this festival runs from the end of May to the end of June on the Gregorian calen

On this inauspicious Dragon Boat Festival, which is regarded as the "Poison Moon" by many, Chinese people practice various customs and ideas to dispel diseases and pray for good health. And, on that day, people used to do things like "hanging mugwort and calamus", "wearing perfume bags", "eating rice dumplings", "racing dragon boats" and "drinking realgar wine". 1. Hanging mugwort calamus May is the arrival of the beginning of summer, and the Dragon Boat Festival is on the fifth day of the fifth lunar month. At this time, it is the time of the epidemic. Mugwort leaves are used in China to treat such diseases. Their fragrance deters flies and mosquitoes. Calamus is an aquatic plant with similar effects. During the day, people usually clean houses, courtyards, and hang wormwood and calamus on the lintel to prevent disease. It is also said that hanging wormwood and calamus can bring good luck to the family. 2. Wear a perfume bag

Everyone knows that "everything has an adaptable temperature", and jasmine is no exception. When cultivating jasmine, the temperature needs to be kept at 10~25 °C; and it is also a light-loving plant, and it needs to receive more than 8 hours of light every day; at the same time, water is also one of the indispensable substances for cultivating jasmine flowers. It needs to be watered every 2 to 3 days; in addition, it is necessary to apply decomposed fertilizer once a half month, prune branches and leaves, and prevent aphids (need to spray oxidation solution such as dimethoate). The last one, if you want to bloom for a longer period of time, you have to pay attention to the maintenance when you put it in the pot. 1. Length of light and temperature suitable for jasmine To cultivate jasmine, the temperature needs to be kept within the range of 10-25 °C. Just like humans, "the temperature in summer is 19-24 °C for the most comfortable human body, and in winter it is 17-22 °

With the improvement of people's living standards, the use of home appliances is becoming more and more common, and refrigerators are one of the more common home appliances in daily life. So, when it comes to using the refrigerator, are you all using it right? How to use it to save power? How to use its fresh-keeping and freezing function best? This also points to "different temperature adjustment in different seasons" in the four seasons. Have you ever heard of the "refrigerator thermostat"? General refrigerators have 0~7 gears, and one gear is when the compressor does not work (also called "off"), that is, 0 gear. From gears 1 to 7, the larger the number, the lower the temperature (I don't know if you have done it wrong before), the temperature of gear 1 is the highest, and the temperature of gear 7 is the lowest. In the four seasons, the temperature adjustment gear of the refrigerator should be adjusted to different settings. Have you ever heard