Составьте пожалуйста сообщение на тему: роль простых организмов в экосистемах.

как читать руссими буквами? Every time I have a stomachache mama takes me to the doktor I don t want to eat my lunch

Какое количество теплоты выделится при охлажде­нии на 80 °С свинцовой детали массой 400 г? 

дробь  m(квадрат)-9/2m(квадрат)+1 умножить на дробь (6m+1/m-3 + 6m-1/m+3)=?

Нужно поставить слова в скобках вправильной форме:)

Я не очень понимаю английский. Хотя бы объясните как правильно?)

People have always complained about lack of time. There's a saying that time is money, but time is ... (important) than money.If occasionally we spend too much money, we know that we can earn it again, it's a ... (renew) thing. Time, however, can never be restored. That's why it's more precious. There are special courses that help ... (person) deal with time ... (efficient). They teach how to set the priorities and how to allocate time for the items in your to-do list. For example, they advise you to write a list of everything you want to do during the week. Then you need to ... (write) it, and to rearrange the items starting with the first priority. Allocate time from the top of the list to ensure that the most important things are done on time. A friend of ... (I) took a course on time ... (manage) and found it quite ... (use). I know that a similar course is run every Saturday in the business school next to my house. I would like to enrol on the course very much, but cannot find time for it.