объясните, в чем состоит участие грудной клетки в процессе дыхания человека

Окружность задана уравнением (х-1)^2+(у-2)^2=16. Напишите уравнение прямой, проходящей через ёё центр точку А(-1;-2)

Что могли бы сказать о знании своего алфавита ученики Древней Греции? Древней Руси?

решите уравнение 3,45*(2,08-k)=6,21

ПЕРЕВЕДИТЕ ПОЖАЛУЙСТА НОРМАЛЬНО,А ТО НА ПЕРЕВОДЧИКЕ СОВСЕМ НИЧЕГО НЕ ПОНЯТНО!

The ecology in Ukraine is in a precarious state.There is an extensive loss of soil fertility.Ukrainian plants are outfitted with outmoded industrial equipment.There are many structural defects in the national economic complex:the servise industries are underdeveloped,and there is an excessive emphasis on heavy industry and production.These problems may be resolved quickly owing to a highly-trained work-force,welldeveloped communications and distribution systems,favourable climate,and opportunities to develop tourism,transit systems,and investments.

 On 26 April 1986,the Unit reactor at the nuclear power station in Chornobyl exploded,spreading deadly radiaction over a vast area of both Eastern and Western Europe.

 Radioactivity recognizes no boundaries.Winds deposited the greatest amount of Chornobyl contamination on Ukraine.The UN Department of Humanitarian Affairs estimates that nearly nine million people have been directly or indirectly affected.Children are the most vulnerable.Research under the World Health Organization(WHO),published in March 1995 by the British Medical Journal,indicates that annual incidence of thyroid cancer in children in the most affected areas of Ukraine is close to 100 times the normal and still rising.WHO scientists warn that skin,breast and lung cancer rates wiil rise in the future.