наиболее устойчивым является биоциноз где прленоедстав около а-100 видов б-60видов в-20видов г-50видов

Write 6 sentences about a trip you are planing to have in summer.Use some of the following words: journey, leave, arrive, luggage, tour, landmark, to book a ticket, a window seat, guided tour, guide, passenger

Пожалуйста решите уравнение: 
2х-4(х+7)=3 умножить на(2-х) 

напишите структурную формулу простейшего алкина с разветвленным углеродным скелетом и назовите его

Откройте скобки!(Помогите пожалуйста) 1.They (to go) on a trip every summer holidays. 2.Why you (not to turn) to the right five minutes ago? 3.We (to walk) barefoot every Sunday. 4.What Willy (to write) now ? 5.Mike (to try) on this suit in an hour? 6.With whoman this man usually (to travel) east? 7.I (to buy) a tiket for a play tomorrow morning. 8.Why you (not to teach) little children? 9.How many times a week she (to do) the shopping?