单选题What is the speaker’s main topic?A Effects of using mobile phones on healthy human cells.B Risks of developing cancer involved in the use of mobile phones.C Damage to healthy cells caused by the use of mobile phones.D The potential health hazards of mo

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第二篇

Cell Phones : Hang Up or Keep Talking?

Millions of people are using cell phones today.In many places it is actually considered unusual not to
use one.In many countries,cell phones are very popular with young people.They find that the phones are
more than a means of communication一having a mobile phone shows that they are cool and connected.
The explosions around the world in mobile phone use make some health professionals worried.Some
doctors are concerned that in the future many people may suffer health problems from the use of mobile
phones.In England,there has been a serious debate about this issue. Mobile phone companies are worried about
the negative publicity of such ideas.They say that there is no proof that mobile phones are bad for your health.
On the other hand,why do some medical studies show changes in the brain cells of some people who use
mobile phones?Signs of change in the tissues of the brain and head can be detected with modern scanning
equipment. In one case,a traveling salesman had to retire at a young age because of serious memory loss.He
couldn't remember even simple tasks.He would often forget the name of his own son.This man used to talk
on his mobile phone for about six hours a day,every day of his working week,for a couple of years. His family
doctor blamed his mobile phone use,but his employer's doctor didn't agree.
What is it that makes mobile phones potentially harmful?The answer is radiation.High-tech machines
can detect very small amounts of radiation from mobile phones.Mobile phone companies agree that there is
some radiation,but they say the amount is too small to worry about.
As the discussion about their safety continues,it appears that it's best to use mobile phones less often.
Use your regular phone if you want to talk for a long time.Use your mobile phone only when you really need
it. Mobile phones can be very useful and convenient,especially in emergencies.In the future,mobile phones
may have a warning label that says they are bad for your health.So for now,it's wise not to use your mobile
phone too often.

The writer's purpose of writing this article is to advise people_________.
A:to buy mobile phones
B:to use mobile phones less often
C:to update regular phones
D:to stop using mobile phones

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第二篇

Cell Phones : Hang Up or Keep Talking?

Millions of people are using cell phones today.In many places it is actually considered unusual not to
use one.In many countries,cell phones are very popular with young people.They find that the phones are
more than a means of communication一having a mobile phone shows that they are cool and connected.
The explosions around the world in mobile phone use make some health professionals worried.Some
doctors are concerned that in the future many people may suffer health problems from the use of mobile
phones.In England,there has been a serious debate about this issue. Mobile phone companies are worried about
the negative publicity of such ideas.They say that there is no proof that mobile phones are bad for your health.
On the other hand,why do some medical studies show changes in the brain cells of some people who use
mobile phones?Signs of change in the tissues of the brain and head can be detected with modern scanning
equipment. In one case,a traveling salesman had to retire at a young age because of serious memory loss.He
couldn't remember even simple tasks.He would often forget the name of his own son.This man used to talk
on his mobile phone for about six hours a day,every day of his working week,for a couple of years. His family
doctor blamed his mobile phone use,but his employer's doctor didn't agree.
What is it that makes mobile phones potentially harmful?The answer is radiation.High-tech machines
can detect very small amounts of radiation from mobile phones.Mobile phone companies agree that there is
some radiation,but they say the amount is too small to worry about.
As the discussion about their safety continues,it appears that it's best to use mobile phones less often.
Use your regular phone if you want to talk for a long time.Use your mobile phone only when you really need
it. Mobile phones can be very useful and convenient,especially in emergencies.In the future,mobile phones
may have a warning label that says they are bad for your health.So for now,it's wise not to use your mobile
phone too often.

The word"detected"in Paragraph 3 could be best replaced by_________.
A:cured
B:removed
C:discovered
D:caused

In order to be able to _______ promptly to road hazards, drivers are advised to avoid using mobile phones while driving.

A.respond
B.require
C.prove
D.promise

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第三篇

Cell Phones : Hang Up or Keep Talking?

Millions of people are using cell phones today.In many places it is actually considered unusual not to
use one.In many countries,cell phones are very popular with young people.They find that the phones are
more than a means of communication一having a mobile phone shows that they are cool and connected.
The explosions around the world in mobile phone use make some health professionals worried.Some
doctors are concerned that in the future many people may suffer health problems from the use of mobile
phones.In England,there has been a serious debate about this issue.Mobile phone companies are worried
about the negative publicity of such ideas.They say that there is no proof that mobile phones are bad for your
health.
On the other hand,why do some medical studies show changes in the brain cells of some people who use
mobile phones?Signs of change in the tissues of the brain and head can be detected with modern scanning
（扫描）equipment. In one case , a traveling salesman had to retire at a young age because of serious memory
Loss.He couldn't remember even simple tasks.He would often forget the name of his own son.This man used
to talk on his mobile phone for about six hours a day,every day of his working week,for a couple of years.
His family doctor blamed his mobile phone use,but his employer's doctor didn't agree.
What is it that makes mobile phones potentially harmful?The answer is radiation.High-tech machines
can detect very small amounts of radiation from mobile phones.Mobile phone companies agree that there is
some radiation,but they say the amount is too small to worry about.
As the discussion about their safety continues,it appears that it's best to use mobile phones less often.
Use your regular phone if you want to talk for a long time.Use your mobile phone only when you really need
it.Mobile phones can be very useful and convenient,especially in emergencies.In the future,mobile phones
may have a warning label that says they are bad for your health.So for now,it's wise not to use your mobile
phone too often.

The writer's purpose of wnting this article is to advise people__________.
A:to use mobile phones less often
B:to update regular phones
C:to stop using mobile phones
D:to buy mobile phones

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第三篇

Cell Phones : Hang Up or Keep Talking?

Millions of people are using cell phones today.In many places it is actually considered unusual not to
use one.In many countries,cell phones are very popular with young people.They find that the phones are
more than a means of communication一having a mobile phone shows that they are cool and connected.
The explosions around the world in mobile phone use make some health professionals worried.Some
doctors are concerned that in the future many people may suffer health problems from the use of mobile
phones.In England,there has been a serious debate about this issue.Mobile phone companies are worried
about the negative publicity of such ideas.They say that there is no proof that mobile phones are bad for your
health.
On the other hand,why do some medical studies show changes in the brain cells of some people who use
mobile phones?Signs of change in the tissues of the brain and head can be detected with modern scanning
（扫描）equipment. In one case , a traveling salesman had to retire at a young age because of serious memory
Loss.He couldn't remember even simple tasks.He would often forget the name of his own son.This man used
to talk on his mobile phone for about six hours a day,every day of his working week,for a couple of years.
His family doctor blamed his mobile phone use,but his employer's doctor didn't agree.
What is it that makes mobile phones potentially harmful?The answer is radiation.High-tech machines
can detect very small amounts of radiation from mobile phones.Mobile phone companies agree that there is
some radiation,but they say the amount is too small to worry about.
As the discussion about their safety continues,it appears that it's best to use mobile phones less often.
Use your regular phone if you want to talk for a long time.Use your mobile phone only when you really need
it.Mobile phones can be very useful and convenient,especially in emergencies.In the future,mobile phones
may have a warning label that says they are bad for your health.So for now,it's wise not to use your mobile
phone too often.

People buy cell phones for the following reasons EXCEPT that__________.
A:they're convenient
B:they're useful
C:they're popular
D:they're cheap

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第二篇

Cell Phones : Hang Up or Keep Talking?

Millions of people are using cell phones today.In many places it is actually considered unusual not to
use one.In many countries,cell phones are very popular with young people.They find that the phones are
more than a means of communication一having a mobile phone shows that they are cool and connected.
The explosions around the world in mobile phone use make some health professionals worried.Some
doctors are concerned that in the future many people may suffer health problems from the use of mobile
phones.In England,there has been a serious debate about this issue. Mobile phone companies are worried about
the negative publicity of such ideas.They say that there is no proof that mobile phones are bad for your health.
On the other hand,why do some medical studies show changes in the brain cells of some people who use
mobile phones?Signs of change in the tissues of the brain and head can be detected with modern scanning
equipment. In one case,a traveling salesman had to retire at a young age because of serious memory loss.He
couldn't remember even simple tasks.He would often forget the name of his own son.This man used to talk
on his mobile phone for about six hours a day,every day of his working week,for a couple of years. His family
doctor blamed his mobile phone use,but his employer's doctor didn't agree.
What is it that makes mobile phones potentially harmful?The answer is radiation.High-tech machines
can detect very small amounts of radiation from mobile phones.Mobile phone companies agree that there is
some radiation,but they say the amount is too small to worry about.
As the discussion about their safety continues,it appears that it's best to use mobile phones less often.
Use your regular phone if you want to talk for a long time.Use your mobile phone only when you really need
it. Mobile phones can be very useful and convenient,especially in emergencies.In the future,mobile phones
may have a warning label that says they are bad for your health.So for now,it's wise not to use your mobile
phone too often.

The salesman retired young because_________.
A:he disliked using mobile phones
B:he was tired of talking on his mobile phone
C:his employer's doctor persuaded him to
D:he couldn't remember simple tasks

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第二篇

Cell Phones : Hang Up or Keep Talking?

Millions of people are using cell phones today.In many places it is actually considered unusual not to
use one.In many countries,cell phones are very popular with young people.They find that the phones are
more than a means of communication一having a mobile phone shows that they are cool and connected.
The explosions around the world in mobile phone use make some health professionals worried.Some
doctors are concerned that in the future many people may suffer health problems from the use of mobile
phones.In England,there has been a serious debate about this issue. Mobile phone companies are worried about
the negative publicity of such ideas.They say that there is no proof that mobile phones are bad for your health.
On the other hand,why do some medical studies show changes in the brain cells of some people who use
mobile phones?Signs of change in the tissues of the brain and head can be detected with modern scanning
equipment. In one case,a traveling salesman had to retire at a young age because of serious memory loss.He
couldn't remember even simple tasks.He would often forget the name of his own son.This man used to talk
on his mobile phone for about six hours a day,every day of his working week,for a couple of years. His family
doctor blamed his mobile phone use,but his employer's doctor didn't agree.
What is it that makes mobile phones potentially harmful?The answer is radiation.High-tech machines
can detect very small amounts of radiation from mobile phones.Mobile phone companies agree that there is
some radiation,but they say the amount is too small to worry about.
As the discussion about their safety continues,it appears that it's best to use mobile phones less often.
Use your regular phone if you want to talk for a long time.Use your mobile phone only when you really need
it. Mobile phones can be very useful and convenient,especially in emergencies.In the future,mobile phones
may have a warning label that says they are bad for your health.So for now,it's wise not to use your mobile
phone too often.

People buy cell phones for the following reasons EXCEPT that_________.
A:they're popular
B:they're useful
C:they're cheap
D:they're convenient

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第二篇

Cell Phones : Hang Up or Keep Talking?

Millions of people are using cell phones today.In many places it is actually considered unusual not to
use one.In many countries,cell phones are very popular with young people.They find that the phones are
more than a means of communication一having a mobile phone shows that they are cool and connected.
The explosions around the world in mobile phone use make some health professionals worried.Some
doctors are concerned that in the future many people may suffer health problems from the use of mobile
phones.In England,there has been a serious debate about this issue. Mobile phone companies are worried about
the negative publicity of such ideas.They say that there is no proof that mobile phones are bad for your health.
On the other hand,why do some medical studies show changes in the brain cells of some people who use
mobile phones?Signs of change in the tissues of the brain and head can be detected with modern scanning
equipment. In one case,a traveling salesman had to retire at a young age because of serious memory loss.He
couldn't remember even simple tasks.He would often forget the name of his own son.This man used to talk
on his mobile phone for about six hours a day,every day of his working week,for a couple of years. His family
doctor blamed his mobile phone use,but his employer's doctor didn't agree.
What is it that makes mobile phones potentially harmful?The answer is radiation.High-tech machines
can detect very small amounts of radiation from mobile phones.Mobile phone companies agree that there is
some radiation,but they say the amount is too small to worry about.
As the discussion about their safety continues,it appears that it's best to use mobile phones less often.
Use your regular phone if you want to talk for a long time.Use your mobile phone only when you really need
it. Mobile phones can be very useful and convenient,especially in emergencies.In the future,mobile phones
may have a warning label that says they are bad for your health.So for now,it's wise not to use your mobile
phone too often.

On the safety issue of mobile phones,the manufacturing companies_________.
A:deny the existence of mobile phone radiation
B:develop new technology to reduce mobile phone radiation
C:try to prove that mobile phones are not harmful to health
D:hold that the amount of radiation is too small to worry about

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第三篇

Cell Phones : Hang Up or Keep Talking?

Millions of people are using cell phones today.In many places it is actually considered unusual not to
use one.In many countries,cell phones are very popular with young people.They find that the phones are
more than a means of communication一having a mobile phone shows that they are cool and connected.
The explosions around the world in mobile phone use make some health professionals worried.Some
doctors are concerned that in the future many people may suffer health problems from the use of mobile
phones.In England,there has been a serious debate about this issue.Mobile phone companies are worried
about the negative publicity of such ideas.They say that there is no proof that mobile phones are bad for your
health.
On the other hand,why do some medical studies show changes in the brain cells of some people who use
mobile phones?Signs of change in the tissues of the brain and head can be detected with modern scanning
（扫描）equipment. In one case , a traveling salesman had to retire at a young age because of serious memory
Loss.He couldn't remember even simple tasks.He would often forget the name of his own son.This man used
to talk on his mobile phone for about six hours a day,every day of his working week,for a couple of years.
His family doctor blamed his mobile phone use,but his employer's doctor didn't agree.
What is it that makes mobile phones potentially harmful?The answer is radiation.High-tech machines
can detect very small amounts of radiation from mobile phones.Mobile phone companies agree that there is
some radiation,but they say the amount is too small to worry about.
As the discussion about their safety continues,it appears that it's best to use mobile phones less often.
Use your regular phone if you want to talk for a long time.Use your mobile phone only when you really need
it.Mobile phones can be very useful and convenient,especially in emergencies.In the future,mobile phones
may have a warning label that says they are bad for your health.So for now,it's wise not to use your mobile
phone too often.

On the safety issue of mobile phones,the manufacturing companies__________.
A:deny the existence of mobile phone radiation
B:develop new technology to reduce mobile phone radiation
C:hold that the amount of radiation is too small to worry about
D:try to prove that mobile phones are not harmful to health

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Can Mobile Phones Cause Disease?

1 "Mobile phone killed my man,"screamed one headline last year.Also came claims
that an unpublished study had found that mobile phones cause memory loss.And a British
newspaper devoted its front page to a picture supposedly（假定地）showing how mobile
phones heat the brain.
2 For anyone who uses a mobile phone,these are worrying times.But speak to the scientists
whose work is the focus of these scares and you will hear a different story.According to them,
there is no evidence that mobile phones cause cancer or any other illness in people.
3 What we do have,however,are some results suggesting that mobile phones' emissions
have a variety of strange effects on living tissue that can't be explained by the general
radiation biology.And it's only when the questions raised by these experiments are
answered that we'll be able to say for sure what mobile phones might be doing to the head.
4 One of the odd effects comes from the now famous"memory loss"study.Alan Preece
and his colleagues at the University of Bristol placed a device that imitated the microwave
emissions of mobile phones to the left ear of volunteers.The volunteers were just as good
at recalling words and pictures they had been shown on a computer screen whether or not
the device was switched on.Preece says he still can't comment on the effects of using a
mobile phone for years on end.But he rules out the suggestion that mobile phones have an
immediate effect on our cognitive abilities."I'm pretty sure there is no effect on short-term
memory,"he says.
5 Another expert,Tattersall,remarked that his latest findings have removed fears about
memory loss.One result, for instance, suggests that nerve cell synapses（突触）
exposed to microwaves become more-rather than less-receptive（感受的）to undergoing
changes linked to memory formation.
6 Hopefully,microwaves might turn out to be good for you.It sounds crazy,but a couple
of years ago a team led by William Adey at the Veterans Affairs Medical Center in California,
found that mice exposed to microwaves for two hours a day were less likely to develop brain
tumours when given a cancer-causing chemical.

Tattersall said for sure that the________over memory loss caused by mobile phones was ungrounded.
A:difterent messages
B:is hoped
C:public attention
D:solid evidence
E:attracted public attention
F:public anxiety