Question

London, Reuters--What could annoy teenagers enough to make them stop hanging out with friends and go home？
No, it's not a visit from their mothers, and not a threat to take away their cellphones or pocket money.
It's high-frequency noise. The UK police recently agreed to use a device (裝置) called the Sonic Teenager Deterrent. It sends out a sound that makes teenagers become so impatient and angry that they have to cover their ears tightly and walk away.
The sound is at extreme high-pitch that can be heard by those under 20. The body's natural ability to detect some wave bands decreases almost entirely after 20, so few adults can hear the sounds. The black-box device, nicknamed the Mosquito because of its sound, can be fixed to the outside walls of shops, offices and homes. It sounds to youngsters like a crazy insect or a badly played violin. But it causes no physical damage.
A number of police forces and councils have given permission to use the system and want to install (安裝) it at trouble spots.
Staffordshire Police Inspector Amanda Davies, who has given the device to shopkeepers in the Moorlands area, said," It is controlled by the shopkeepers--if they can see through their window that there is a problem, they turn the device on for a while until the group has run away."
【小題1】The device can be used to _______.

A．threaten teenagers in public

B．drive away trouble-makers under 20

C．help mothers control their teenage children

D．help the police control shopkeepers

【小題2】From the passage we can know that _______.

A．young people often suffer from pains in ears

B．shopkeepers are troubled by noisy insects

C．high-frequency noise is beyond the listening ability of people over 20

D．the police invented a new device to deal with teenagers

【小題3】The purpose of the writer to write the passage is ______.

A．to advertise a new hi-tech device

B．to tell the reader a piece of news

C．to sell the device to shopkeepers

D．to inform the public as the spokesman of the police

【小題4】Who will welcome the device most?

A．Shopkeepers.

B．The police.

C．Young people.

D．The producer.

Answer 1

【小題1】B
【小題2】C
【小題3】B
【小題4】A 

解析試題分析：本文介紹了一種新型的裝置，可以趕走在街頭打架鬧事的年輕人，而不會(huì)給成人帶來麻煩。
【小題1】細(xì)節(jié)題：從第三段的句子：It sends out a sound that makes teenagers become so impatient and angry that they have to cover their ears tightly and walk away.
The sound is at extreme high-pitch that can be heard by those under 20.可知這種裝置可以趕走20歲以下的年輕人。選B
【小題2】細(xì)節(jié)題：從第二段的句子：The body's natural ability to detect some wave bands decreases almost entirely after 20,可知20歲以上的人聽不見高頻噪音。選C
【小題3】主旨題：從第一句London, Reuters--What could annoy teenagers enough to make them stop hanging out with friends and go home？可知這是一則消息。選B
【小題4】推理題：從最后一段的句子：It is controlled by the shopkeepers--if they can see through their window that there is a problem, they turn the device on for a while until the group has run away."可知店主最歡迎這種設(shè)備。選A
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