If you want to learn more about the U.S. contribution to the world s science and technology, thank y

Communications: **, TV**, cordless ** system, mobile phone, Internet, geosynchronous satellite broadcasting, GPS, fiber optic communication.

All the means of communication we use now were invented in the United States).

Electrical appliances: analog TV, digital TV, radio, tape recorder, VCR, microwave oven, washing machine, air conditioner, refrigerator.

Bottom line: basically all the appliances in your home were invented by Americans)

Electronic technology: transistors, semiconductor devices, integrated circuits, chips,。。

In short, almost everything in this computer you use now is an American invention).

Software: operating systems, computer languages, compilers, all kinds of application software, games...

For example, the windows you are using right now, and the browser).

Vehicles: 4-wheeled cars, airplanes, liquid rockets, space shuttles, moon landing, landing on Mars, space exploration.

What we ride now, and what will come in the future, will depend on the Americans)

Optical photocopying: film, video camera, laser, modern typesetting printing, digital camera, photocopier.

Petrochemical: modern petrochemical, plastic, nylon, non-stick pan,。。

Energy: generators, power grids, nuclear energy...

Entertainment: Hollywood, Disney.

Food culture: McDonald's, Coca-Cola, Pepsi, Pizza Hut, KFC.

Medical: Cardiac pacemaker, the first effective oral contraceptive,。。

Military: The first nuclear-powered submarine, neutron bombs, too many...

Astronautics: the world's first experimental meteorological satellite, the Apollo spacecraft, the moon landing, the space shuttle "Columbia".

Many important inventions in human history, including incandescent lamps, cotton gins, general-purpose parts, production lines, etc., all originated from the United States, the United States was the first to develop the atomic bomb, and the Apollo moon landing program was carried out during the Cold War to land on the moon. At present, the United States is a world leader in rocket technology, research, materials science, medicine, bioengineering, computer and many other fields.

70-25=45 (years) 45 times 365=3225 (days) 2 hours 20 minutes = 140 minutes 140 times 3225 = 323500 (minutes) 323500 minutes = 5390 hours 10 minutes 5390 hours = 224 days and 14 hours.

A: It will be shortened by 224 days and 14 hours.

It's not something that can be calculated, there are various factors that contribute to death.

It's still a problem to live to less than 70, Yuan Fang, what do you think about this?

Oh, this question, maybe you don't have to ask: live less 14194 a days, about 39 a year.

At the end of the day, you have to live a few hours less, which is about a day;

40 years, about 14,600 days.

Deceiving, how can it be so accurate.

This is a lie, how can it be so detailed!!