题目内容：

阅读下面短文，根据其内容写一篇60词左右的概要。

Is a knife useful instrument or a dangerous weapon? It depends on how it is used. It’s the same with technology and one of those greatest inventions is cell phones. They have revolutionized the human existence. This is possible only because they are getting cheaper and cheaper. The technology has made it even easier to give them a longer life.

Undoubtedly, if cell phones are in right hands, no matter how far we are setting we can talk anytime anywhere! We can watch favourite TV shows, listen to favourite songs,etc, as cell phones are equipped with all high-tech features. In fact, it’s good to parents as well as children. Parents can monitor their children and children are also safe. If anyone is an any ind of danger, ahe or he can call for help immediately.

There are always two sides of a coin. The technology has caused a danger that we keep ignoring. The cell phones have progressed rapidly and at the same time they provide us with more tasks than what we would attempt. When a person is multitasking rather than complete a single task, this causes burden and results in stress. Also cell phones have made terrorist attacks in the world very easy. Besides, children spend much of their time in playing games instead of going out and playing, which is very harmful to them.

We should always remember that there lives a wise man between the valley of two mountains. Are cell phones a useful instrument or a dangerous weapon? The answer lies in our hands.

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