Сочинение по на тему первый в мире луноход 10 - 15 предложений.

"lunokhod-1" (8el device number 203) - the first in mireplanetohod successfully worked on the surface of another celestial body - the moon from 17 november 1970 to 14 september 1971. it was intended to study the characteristics of the lunar surface, and rentgenovskogokosmicheskogo radioactive radiation on the moon, the chemical composition and properties of the soil. planetary weight was 756 kg, with an open length of a solar battery - 4.42 m, width - 2.15 m, height - 1.92 m diameter wheels -. 510 mm, width - 200 mm, wheelbase - 1700 mm, track width - 1600 mm. delivered on the moon the soviet interplanetary station "luna-17" on november 17, 1970, and worked on its surface until september 14, 1971 (this day was held last successful session with the device).

pros.

it is really very convenient, in most phones there is the internet, which allows you to instantly find the information you need or exchange a message with a friend, not only at home, on your computer or laptop, but also in any other place convenient for you.

you can call anywhere in the world and talk with the person you need.

the mobile phone is convenient and compact.

a mobile phone in some way replaces us with many items. it has everything you need, it can be a book, reference book, map, notebook, alarm clock and much more.

but, despite all this, mobile devices have disadvantages.

the very first and most important thing - a mobile phone can lead to various diseases, ranging from allergies to cancer. the radiation that the phone transmits is a big threat to the person in fact. an incredible amount of germs accumulates on the phone.

the second is that the phone "eats us." now it’s much harder to talk to a person on the street and ask elementarily what time it is. for us, this is some kind of barrier to society. we are closing. this is not very good.

also, the device absorbs a huge amount of our time, especially in adolescents.