Ответ разместил: Гость
Have you watered the flowers yet? (water/already/yet)1. we have just washed off graffiti from all the houses in our street. 2. my dad is happy. i have helped to rake the leaves in the garden.3. i have got five excellent marks at school today.4. i can go to the cinema now. i have already learnt the poem.5. my brother has been playing tennis since 2 o’clock.6. i have been playing the violin for two hours.
Поставь глагол в форму present simple или present continuous. 1. my parents always (to lead) healthy lifestyle. 2. the cow (to live) in the barn. 3. mum (to bring) me a cup of tea in bed. 4. my friends often (to lose) their keys. 5. granny always (to make) me a tasty lunch. 6. daddy (not / to check) a stranger’s id before opening the door but mum always (to do) it. 7. they (not / to put up) a fight, they are peaceful people. 8. if a burglar (to break), hand over valuables.
Транскрипция слов: on the right, on the left, serious, best, sticker, model car, clocks, seashells, coins, toy soldier, posters, soft toys, let's swap, it's a deal, a hit song, music programme, dj, caller, mouse, screen, processor, keyboard, button, science, geography, fourt times a week, once a week, twice a week, before, after, wear, do, put, don't, don't put, write, get up, wash and dress, have break fast, go to school.
Определить траекторию скорости и ускорения точки по заданным уровням ее движения. По заданным уровням точки установить вид ее траектории в момент времени t=1с. Найти положение точки, ее скорость, полное, касательное и нормальное ускорение, а также радиус кривизны траектории. x=x(t),cm=-2t²+3 y=y(t),cm=-5t t1,c=1