两篇英语短文改错求答案

两篇英语短文改错求答案
Many scientists believe that life begin in the ocean.For age man has used the ocean to discover and explore new lands.Now man spends a great deal time and money discovering the ocean.We know it is rich at minerals which the world need.We also know that it contains enough food for the all people in the world.We know that if the salt is taken from it,it's water would turn the deserts in rich farm lands.We know a great deal about this last frontier,as it has called.But we still need to learn many more about it.
Man-made satellites are sended up into space by rocket with a speed of 40,000 k.p.h.to escape the pull of the earth.A satellite is one of the most expensive piece of scientific equipment.First,it must very light.Second,it contains of very expensive cameras and equipment to turn solar energy into electricity as wel as.Satellites of broadcasting can send radio and TV programme from one part of the world to another after less than a second.Weather satellites can tell us what the weather like by sending back information and photos of weather conditions
如果能一段找出 10个就太好了