Who invented the mobile phone?

Mobile phone, fully known as wireless phone, was originally just a communication tool and a portable telephone terminal that can be used in a wide range Mobile phones are divided into smart phones and non feature phones Who invented the mobile phone?The mobile phone was first developed from the battlefield mobile phone manufactured by Bell Laboratories in 1940 In 1958, Leonid, a Soviet engineer Kuprijanovic invented ЛК- Type 1 mobile phone In 1973, American Motorola engineer Martin Cooper invented the world& 39;s first commercial mobile phone ...

01-24 133℃ 0


What's the matter with carsickness?

Some people get dizzy and vomit when they take a bus or long-distance bus, and they feel uncomfortable when they see it! So what& 39;s the matter with carsickness?Motion sickness is called motion sickness (MS) in medicine In fact, it is related to the problem of balance regulation of vestibular system When a person sits in a moving car or boat, the vestibule of the inner ear has sensed that the body is moving, but the eyes think that the body is ...

01-23 138℃ 23


The dressing guidelines for 25 ℃ China

In different regions, the feeling of cold and heat felt by human skin will also be different For example, it is wet and cold in southern China and dry and cold in northern China At the same temperature, wet and cold is colder than dry and cold Let& 39;s take a look at the dressing guidelines for 25 ℃ China?When the temperature is about 25 ℃, you can choose long T-shirts, thin coats, short vests, thin coats, single sweaters, thin pants, jeans ...

01-23 152℃ 16


what is a liquid sanitary napkin?

Sanitary napkin is a must for every girl A good sanitary napkin product can play a lot of uses Now a new liquid sanitary napkin is on the market As soon as it comes out, it is recommended by many people to be easy to use So what is a liquid sanitary napkin?Liquid sanitary napkin is a new type of sanitary napkin Although the name contains liquid, there is no liquid in it Different from the cotton fiber used in traditional sanitary napkins, ...

01-23 106℃ 9


Can you hold milk in a thermos?

Milk is a common drink in people& 39;s life, but some people boil the milk and put it into thermos bottles or cups for preservation Can you hold milk in a thermos?A thermos can hold milk The storage time of milk in a thermos cup shall not exceed 1 hour, because the heat preservation effect of the thermos cup will gradually decline with time If it reaches 20-40 degrees, the miscellaneous bacteria falling into the milk will begin to reproduce, and the rich protein in the milk provides good nutrients for the bacteria, which is more likely to be polluted by bacteria and deteriorate ...

01-23 186℃ 3


Is plastic wrap toxic when heated?

I believe many people are using plastic wrap, especially when heating food Some people like to wrap the food with plastic wrap and heat it directly Is plastic wrap toxic when heated?If it is stated on the package that the fresh-keeping film cannot be heated, some toxic substances may be produced during the heating process After all, there are some chemicals in the production process of the fresh-keeping film Chemical substances are easy to react d ...

01-23 172℃ 5


What if the TPU material turns yellow?

TPU is favored by the rubber and plastic material industry for its excellent wear resistance, environmental protection, tear resistance, transparency, self-adhesive, elasticity, hand feel and other properties However, TPU has a natural defect, that is, TPU gradually turns yellow over time So what if the TPU material turns yellow?1 Avoid direct sunlight The storage area of polyurethane shall be cool and ventilated TPU can be packed in plastic bags and ...

01-23 192℃ 1


How to clean the stainless steel handrails?

Stainless steel handrails are stable in nature and are not easy to corrode and rust However, if stainless steel comes into contact with water, it will rust for a long time How to clean the stainless steel handrails when they are rusted?1 Vinegar: vinegar in the kitchen is a very useful household cleaning tool It not only has good cleaning effect, but also plays the role of disinfectant Methods: adjust the proportion of water and vinegar, then p ...

01-23 159℃ 0


How to solve the static electricity in plush quilt?

The air is relatively dry in winter, which is very easy to generate static electricity Sometimes even sleeping in bed will have static electricity How to solve the static electricity in plush quilt?When it is sunny, put the quilt in the sun for 1-3 hours, and 80% of the chance can solve the problem If it& 39;s winter, you can turn on the electric blanket when you sleep, and it will get better after an hour Static electricity is usually generated ...

01-23 140℃ 0


What places in the home are suitable for hanging pictures?

Decorative painting can improve the design of home taste Through decorative painting, the house can appear more warm, comfortable and emotional, giving people a relaxed and comfortable atmosphere So what places in the home are suitable for hanging pictures?1 At the entrance to the house, hanging paintings at the entrance is to extend the space On the other hand, it is a very happy atmosphere to see beautiful paintings when you enter and go out 2 ...

01-23 146℃ 4