какие виды искусственного отбора использовал человек при селекции животных?

Бегун пробегает 200м. за 20с., а пловец за 4 мин. проплывает 400м.Во сколько раз скорость бегуна больше пловца?

conditional(1,2 type) complate the sentences 1. If you becomes Prime Minister,..... If he became Prime Minister,.... 2. If it rains tomorrow,.. If it rained tomorrow,... 3. If she learns to speak Spanish,... If she learnt to speak Spanish,... 4.If wars stop,...If wors stopped,... 5. If he succeeds in life,..If he succeeded in life,.. 6. If they support the child,..If they supported the child,... 7. If i buy a cottage in the wood,... If i bought a cottage in the wood,.... 8. If Annie married Stephen,.. 9. If Nicholas studies harder,.... If Nicholas studied harder,... 10/ If Simon goes to University,... If Simon went to University,....

сумма углов првильного n-угольника равна 2340. найдите внешние углы