两个不同的非零自然数的最大公因数一定小于它们的最小公倍数。[ ]

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CCTV cameras watch action

In UK , Closed Circuit Television (CCTV) cameras are everywhere. They help the police solve crimes and keep the streets safe. But that’s not all they do . They also catch people doing very stupid or smart things.
One of the videos is of a British woman Mary Bale. She clearly doesn’t like cats. In 2010 she was caught on CCTV throwing one into a dustbin. The video shows Mary walking down a quiet street. All of sudden , she notices Lola the cat jump onto a fence. Mary stops to pickup Lola and drops her into a large dustbin . Lola was saved fifteen hours later. And Mary was arrested for causing unnecessary suffering to an animal . She was fined ( 罚款)￡250  and was not allowed to own pets for five years.
Another video shows “ Britain’s drunkest man” . He’s been at a party at London’s Savoy Hotel. And he’d obviously had a few too many glasses of beer. At about 2 a. m. , he was kicked out for being too drunk . So, he decided to walk home. On the way , CCTV cameras filmed him falling down stairs and crossing the roads madly… A Savoy Hotel waiter said, “ It’s amazing he didn’t hurt himself badly.”
Sometimes they also record smart events. Once a British band The Get Out Clause didn’t have any money to make a music video. So , they came up with an unbelievable idea. They set up their instruments ( 乐器) and played a song in front of eight CCTV cameras. And then, according to the English Freedom of Information Act , they asked for a copy of all the footages ( 视频) , which they edited. The result is that a totally new music video was made, and it didn’t cost them a penny.
Title: CCTV cameras catch action

Passage outline	Supporting details
Usage of CCTV cameras	They are almost (1)______________ and are used in many ways.
To help the police solve crimes	A woman saw a lonely cat and (2) ___________ it into a big dustbin. She was fined ￡250 and was not allowed to own pets for five years.
To catch people doing stupid things	A man got very drunk and was thrown out of London’s Savoy Hotel. He went back home through a lot of troubles and dangers but was not (3) ________________hurt.
To (4)____________ people doing Smart events	A band had no money but still wanted to make a music record. They played in front of eight CCTV cameras and asked for the footage copy for (5) ___________________. They edited the footages and make a totally new music video.