英语作文:Computers--one of the most helpful inventions

Computers are popular in our lives.It's hardly to imagine a world without computer.
First of all.Scientists use computers to forecast weather tomorrow.It need 3 years to calculate the result if 100 people are doing the mission rather than one computer's half an hour for the same work.
Second,computers are necessary in banks,communication corporations and governments.
The last.No computers no robots,frequency-changed air conditions or modern movies.Our lives will be drab.

Now more and more families have their own computers.The computer is one of the most helpful inventions.Computers have many advantages,but they also have many disadvantages .On the one hand,you can sea...