приготовления борща на каждый 100грамм мясо надо взять 60грамм свёклы.сколько свеклы надо взять на 650грамм мясо

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Предлоги:at, about, with, over, on, of,up.

Текст: I think teenagers all ... the world have the same  problems. As for me, I get along ... other students in my class rather well. They don't call me ... names, they help me if I need ... any help. I have no problems ... my parents, too. I can invite any friends ... home. What I,m really fed ... ... is sharing a room ... my younger brother. Sometimes I get so angry ... him! My parents aren't happy ... his marks ... school. So I have to take care ... him. I'm depressed ... doing his homeworkwith him every day. If I don't help him, my parents won't allow ... me to go out ... Saturday evening.

Пожалуйста если можно перевести, переведите. Большое спасибо. Желательно побыстрее...

как направленна сила трения, которая действуетна брус, если брус равномерно движется вверх по плоскости??