Трамп высказался о непростом решении по Ирану09:14
Leonardo da Vinci is usually credited with conducting the first systematic study of friction in the late 15th century, a subfield now known as tribology that deals with the dynamics of interacting surfaces in relative motion. Da Vinci's notebooks depict how he pulled rows of blocks using weights and pulleys, an approach that is still used in frictional studies today, as well as examining the friction produced in screw threads, wheels, and axles. The authors of this latest paper used an experimental setup similar to da Vinci's.
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23:27, 27 февраля 2026Россия
“十五五”规划建议提出：“形成既‘放得活’又‘管得好’的经济秩序。”从以前的“管得住”到现在的“管得好”，一字之差，标准更高、意蕴深远。“管得好”，不是“管得多”，也不是“简单管”，而是要在市场发挥决定性作用的前提下，管好那些市场管不了或管不好的事情。