學(xué)歷教育 - 英語考試
共用題干
Learn About Noble Gases（惰性氣體）
1 Have you ever ridden on a balloon?Many tourist spots offer balloon rides in order for people to see
the beauty of a place from above.A balloon contains a noble gas called helium（氦）.Formerly,balloons con-
tamned hydrogen but hydrogen is very flammable and dangerous when uncontrolled.Therefore,people shifted
to helium,which is safer. Helium is safe because it has the properties of the noble gases.
2 People once believed that noble gases couldn't chemically react at all.For this reason,they were
called inert gases(隋性氣體）.They were also listed under Group 0 in the old periodic table because scien-
tists believed that the gases have zero valence（價）electrons in their outer shell.This was later proven to be
untrue when some noble gas compounds were discovered.
3 The gases are elements,which share similar properties.These properties include being monoatomic,
colorless,odorless,being able to conduct electricity,and having low chemical reactivity.Noble gases
include helium,neon,argon,krypton,xenon and radon.These are all found in Group 18,in the right most
column of the periodic table.If you look at the periodic table,you will notice that these elements are the only
ones which do not have a charge. Helium has the lowest molecular（分子的）weight while radon is the
heaviest.
4 Remember that chemical reactions occur because atoms have valence electrons,which are electrons
in their outer shell.When the outer shell is"unfilled"or the required number of electrons is not yet com-
plete,the atom is more reactive.Noble gases have a full outer shell,meaning that they have complete elec-
trons in their outer shell.This complete number varies.For instance,the outer shell of helium has 2 valence
electrons while the outer shell of xenon has 8 electrons.Nowadays,there remains to be a few noble gases
because of the low chemical reactivity of these said gases.
5 because of their properties,noble gases have many important applications.They are widely used in
medicine and industries. For instance , liquid helium is used for superconducting magnets（磁體）.These
magnets are very important in physics and medicine.When a doctor suspects that a person's brain has been
damaged,he might request for Magnetic Resonance Imaging(MRI).MRI allows the doctor to"see"the
brain,without operating on the patient.
Paragraph 3__________
A:What is the Periodic Table?
B:What are Noble Gases?
C:What Causes the Low Chemical Reactivity of Noble Gases?
D:How were Noble Gases Discovered?
E:How were Noble Gases Understood in the Past?
F:What are the Applications of Noble Gases?
查看答案
Learn About Noble Gases（惰性氣體）
1 Have you ever ridden on a balloon?Many tourist spots offer balloon rides in order for people to see
the beauty of a place from above.A balloon contains a noble gas called helium（氦）.Formerly,balloons con-
tamned hydrogen but hydrogen is very flammable and dangerous when uncontrolled.Therefore,people shifted
to helium,which is safer. Helium is safe because it has the properties of the noble gases.
2 People once believed that noble gases couldn't chemically react at all.For this reason,they were
called inert gases(隋性氣體）.They were also listed under Group 0 in the old periodic table because scien-
tists believed that the gases have zero valence（價）electrons in their outer shell.This was later proven to be
untrue when some noble gas compounds were discovered.
3 The gases are elements,which share similar properties.These properties include being monoatomic,
colorless,odorless,being able to conduct electricity,and having low chemical reactivity.Noble gases
include helium,neon,argon,krypton,xenon and radon.These are all found in Group 18,in the right most
column of the periodic table.If you look at the periodic table,you will notice that these elements are the only
ones which do not have a charge. Helium has the lowest molecular（分子的）weight while radon is the
heaviest.
4 Remember that chemical reactions occur because atoms have valence electrons,which are electrons
in their outer shell.When the outer shell is"unfilled"or the required number of electrons is not yet com-
plete,the atom is more reactive.Noble gases have a full outer shell,meaning that they have complete elec-
trons in their outer shell.This complete number varies.For instance,the outer shell of helium has 2 valence
electrons while the outer shell of xenon has 8 electrons.Nowadays,there remains to be a few noble gases
because of the low chemical reactivity of these said gases.
5 because of their properties,noble gases have many important applications.They are widely used in
medicine and industries. For instance , liquid helium is used for superconducting magnets（磁體）.These
magnets are very important in physics and medicine.When a doctor suspects that a person's brain has been
damaged,he might request for Magnetic Resonance Imaging(MRI).MRI allows the doctor to"see"the
brain,without operating on the patient.
Paragraph 3__________
A:What is the Periodic Table?
B:What are Noble Gases?
C:What Causes the Low Chemical Reactivity of Noble Gases?
D:How were Noble Gases Discovered?
E:How were Noble Gases Understood in the Past?
F:What are the Applications of Noble Gases?
共用題干
Most Adults in US Have Low Risk of Heart Disease
More than 80 percent of US adults have a less than 10-percent risk of developing heart disease in the next 10 years,according to a report in the Journal of the American College of Cardiology.Just 3 percent have a risk that exceeds 20 percent.
"I hope that these numbers will give physicians,researchers,health policy analysts,and others a better idea of how coronary heart disease is distributed in the US population,"lead author Dr.Earl S.Ford,from the Centers for Disease Control and Prevention in Atlanta,said in a statement.
The findings are based on analysis of data from 13,769 subjects,between 20 and 79 years of age,who narticipated in the Third National Health and Nutrition Examination Survey from 1988 to 1994.
Overall,82 percent of adults had a risk of less than 10 percent,15 percent had a risk that fell between 10 to 20 percent,and 3 percent had a risk above 20 percent.
The proportion of subjects in the highest risk group increased with advancing age,and men were more likely than women to be in this group.By contrast,race or ethnicity had little effect on risk distributions.
Although the report suggests that most adults have a low 10-year risk of heart disease,a large proportion have ahigh or immediate risk,Dr.Daniel S.Berman,from Cedars-Sinai Medical Center in Los Angeles,and Dr.NathanD.Wong,from the University of California at Irvine,note in a related editorial.
Aggressive treatment measures and public health strategies are needed to shift the overall population risk downward,they add.
According to the passage,which of the following may contribute to the risk of getting heart disease?
A:Age.
B:Ethnicity.
C:Race.
D:Citizenship.
查看答案
Most Adults in US Have Low Risk of Heart Disease
More than 80 percent of US adults have a less than 10-percent risk of developing heart disease in the next 10 years,according to a report in the Journal of the American College of Cardiology.Just 3 percent have a risk that exceeds 20 percent.
"I hope that these numbers will give physicians,researchers,health policy analysts,and others a better idea of how coronary heart disease is distributed in the US population,"lead author Dr.Earl S.Ford,from the Centers for Disease Control and Prevention in Atlanta,said in a statement.
The findings are based on analysis of data from 13,769 subjects,between 20 and 79 years of age,who narticipated in the Third National Health and Nutrition Examination Survey from 1988 to 1994.
Overall,82 percent of adults had a risk of less than 10 percent,15 percent had a risk that fell between 10 to 20 percent,and 3 percent had a risk above 20 percent.
The proportion of subjects in the highest risk group increased with advancing age,and men were more likely than women to be in this group.By contrast,race or ethnicity had little effect on risk distributions.
Although the report suggests that most adults have a low 10-year risk of heart disease,a large proportion have ahigh or immediate risk,Dr.Daniel S.Berman,from Cedars-Sinai Medical Center in Los Angeles,and Dr.NathanD.Wong,from the University of California at Irvine,note in a related editorial.
Aggressive treatment measures and public health strategies are needed to shift the overall population risk downward,they add.
According to the passage,which of the following may contribute to the risk of getting heart disease?
A:Age.
B:Ethnicity.
C:Race.
D:Citizenship.
共用題干
Why India Needs Its Dying Vultures
The vultures（禿鷹）in question may look ugly and threatening , but the sudden sharp decline in three
species of India'S vultures is producing alarm rather than celebration,and it presents the world with a new
kind of environmental problem.The dramatic__________(51)in vulture numbers is causing widespread
disruption to people living in the__________(52)areas as the birds.It is also causing serious public health
problems__________(53)the Indian sub-continent.
While their reputation and appearance may be unpleasant to many Indians,vultures have___________(54)
played a very important role in keeping towns and villages all over India___________(55).It is because they
feed on dead cows.In India,cows are sacred animals and are___________(56) left in the open when they
die in thousands upon thousands every year.
The disappearance of the vultures has___________(57)an explosion in the numbers of wild dogs
feeding on the remains of these___________(58)animals. There are fears that rabies（狂犬癥）may increase as
a result. And this terrifying disease may ultimately（最終）affect humans in the region,___________(59)wild
dogs are its main carriers.Rabies could also spread to other animal species, __________(60)an even
greater problem in the future.
The need for action is___________(61),so an emergency project has been launched to find a solution
to this serious vulture problem?Scientists are trying to___________(62)the disease causing the birds'
deaths and,if possible,develop a cure.
Large-scale vulture___________(63)were first noticed at the end of the l980s in India. A population
survey at that time showed that the three species of vultures had declined___________(64)over 90 per
cent. All three species are now listed as"critically endangered".As most vultures lay only single eggs and
___________(65)about five years to reach maturity,reversing their population decline will be a long and dif-
ficult exercise.
_________(63)
A:deaths
B:injuries
C:arnvals
D:attacks
查看答案
Why India Needs Its Dying Vultures
The vultures（禿鷹）in question may look ugly and threatening , but the sudden sharp decline in three
species of India'S vultures is producing alarm rather than celebration,and it presents the world with a new
kind of environmental problem.The dramatic__________(51)in vulture numbers is causing widespread
disruption to people living in the__________(52)areas as the birds.It is also causing serious public health
problems__________(53)the Indian sub-continent.
While their reputation and appearance may be unpleasant to many Indians,vultures have___________(54)
played a very important role in keeping towns and villages all over India___________(55).It is because they
feed on dead cows.In India,cows are sacred animals and are___________(56) left in the open when they
die in thousands upon thousands every year.
The disappearance of the vultures has___________(57)an explosion in the numbers of wild dogs
feeding on the remains of these___________(58)animals. There are fears that rabies（狂犬癥）may increase as
a result. And this terrifying disease may ultimately（最終）affect humans in the region,___________(59)wild
dogs are its main carriers.Rabies could also spread to other animal species, __________(60)an even
greater problem in the future.
The need for action is___________(61),so an emergency project has been launched to find a solution
to this serious vulture problem?Scientists are trying to___________(62)the disease causing the birds'
deaths and,if possible,develop a cure.
Large-scale vulture___________(63)were first noticed at the end of the l980s in India. A population
survey at that time showed that the three species of vultures had declined___________(64)over 90 per
cent. All three species are now listed as"critically endangered".As most vultures lay only single eggs and
___________(65)about five years to reach maturity,reversing their population decline will be a long and dif-
ficult exercise.
_________(63)
A:deaths
B:injuries
C:arnvals
D:attacks
The city has done away with all the factories in its centre.
A:got rid of
B:set up
C:built
D:destroyed
查看答案
A:got rid of
B:set up
C:built
D:destroyed
If you ignore your diet,trouble will follow.
A:disregard
B:increase
C:break
D:miss
查看答案
A:disregard
B:increase
C:break
D:miss
Alot of people could fall ill after drinking contaminated water.
A:muddled
B:polluted
C:mixed
D:troubled
查看答案
A:muddled
B:polluted
C:mixed
D:troubled
He was tempted by the high salary offered by the company.
A:taught
B:kept
C:changed
D:attracted
查看答案
A:taught
B:kept
C:changed
D:attracted
共用題干
Learn About Noble Gases（惰性氣體）
1 Have you ever ridden on a balloon?Many tourist spots offer balloon rides in order for people to see
the beauty of a place from above.A balloon contains a noble gas called helium（氦）.Formerly,balloons con-
tamned hydrogen but hydrogen is very flammable and dangerous when uncontrolled.Therefore,people shifted
to helium,which is safer. Helium is safe because it has the properties of the noble gases.
2 People once believed that noble gases couldn't chemically react at all.For this reason,they were
called inert gases（惰性氣體）.They were also listed under Group 0 in the old periodic table because scien-
tists believed that the gases have zero valence（價）electrons in their outer shell.This was later proven to be
untrue when some noble gas compounds were discovered.
3 The gases are elements,which share similar properties.These properties include being monoatomic,
colorless,odorless,being able to conduct electricity,and having low chemical reactivity.Noble gases
include helium,neon,argon,krypton,xenon and radon.These are all found in Group 18,in the right most
column of the periodic table.If you look at the periodic table,you will notice that these elements are the only
ones which do not have a charge. Helium has the lowest molecular（分子的）weight while radon is the
heaviest.
4 Remember that chemical reactions occur because atoms have valence electrons,which are electrons
in their outer shell.When the outer shell is"unfilled"or the required number of electrons is not yet corn-
plete,the atom is more reactive.Noble gases have a full outer shell,meaning that they have complete elec-
trons in their outer shell.This complete number varies.For instance,the outer shell of helium has 2 valence
electrons while the outer shell of xenon has 8 electrons.Nowadays,there remains to be a few noble gases
because of the low chemical reactivity of these said gases.
5 because of their properties,noble gases have many important applications.They are widely used in
medicine and industries. For instance , liquid helium is used for superconducting magnets（磁體）.These
magnets are very important in physics and medicine.When a doctor suspects that a person's brain has been
damaged,he might request for Magnetic Resonance Imaging(MRI).MRI allows the doctor to"see"the
brain,without operating on the patient.
Paragraph 3____________
A:How were Noble Gases Discovered?
B:What is the Periodic Table?
C:What are the Applications of Noble Gases?
D:How were Noble Gases Understood in the Past?
E:What Causes the Low Chemical Reactivity of Noble Gases?
F:What are Noble Gases?
查看答案
Learn About Noble Gases（惰性氣體）
1 Have you ever ridden on a balloon?Many tourist spots offer balloon rides in order for people to see
the beauty of a place from above.A balloon contains a noble gas called helium（氦）.Formerly,balloons con-
tamned hydrogen but hydrogen is very flammable and dangerous when uncontrolled.Therefore,people shifted
to helium,which is safer. Helium is safe because it has the properties of the noble gases.
2 People once believed that noble gases couldn't chemically react at all.For this reason,they were
called inert gases（惰性氣體）.They were also listed under Group 0 in the old periodic table because scien-
tists believed that the gases have zero valence（價）electrons in their outer shell.This was later proven to be
untrue when some noble gas compounds were discovered.
3 The gases are elements,which share similar properties.These properties include being monoatomic,
colorless,odorless,being able to conduct electricity,and having low chemical reactivity.Noble gases
include helium,neon,argon,krypton,xenon and radon.These are all found in Group 18,in the right most
column of the periodic table.If you look at the periodic table,you will notice that these elements are the only
ones which do not have a charge. Helium has the lowest molecular（分子的）weight while radon is the
heaviest.
4 Remember that chemical reactions occur because atoms have valence electrons,which are electrons
in their outer shell.When the outer shell is"unfilled"or the required number of electrons is not yet corn-
plete,the atom is more reactive.Noble gases have a full outer shell,meaning that they have complete elec-
trons in their outer shell.This complete number varies.For instance,the outer shell of helium has 2 valence
electrons while the outer shell of xenon has 8 electrons.Nowadays,there remains to be a few noble gases
because of the low chemical reactivity of these said gases.
5 because of their properties,noble gases have many important applications.They are widely used in
medicine and industries. For instance , liquid helium is used for superconducting magnets（磁體）.These
magnets are very important in physics and medicine.When a doctor suspects that a person's brain has been
damaged,he might request for Magnetic Resonance Imaging(MRI).MRI allows the doctor to"see"the
brain,without operating on the patient.
Paragraph 3____________
A:How were Noble Gases Discovered?
B:What is the Periodic Table?
C:What are the Applications of Noble Gases?
D:How were Noble Gases Understood in the Past?
E:What Causes the Low Chemical Reactivity of Noble Gases?
F:What are Noble Gases?
共用題干
If you made a list of all the jobs performed by the different kinds of energy,you would fill many pages.
Nuclear energy is used in some areas of the United States.But there are dangers.Waste materials from nuclear______(51)would destroy life if they leaked______(52)the land.When nuclear energy is produced,a lot of______(53)is produced,too,50 a flow of lake or ocean water 15 used to cool the operations.Then the water______(54)to its source.If the returning water were too hot,it would destroy fish and other______(55).
Cow manure is being used to produce a kind of______(56).The manure from farms is put into a machine to convert it to a liquid.Then the gas 15 formed______(57)a natural process.If the converter were not 50______(58)at the present time,it would be used in many places to provide______(59).
Garbage has become an energy source.It______(60)to oil,steam,or electricity,or it is used on the land.
But recent______(61)about power supplies has led to increased interest in the use of wind______(62)a source of electrical power.Windmills are clean and they______(63)no waste.And they use a______(64)resource.Some scientists consider that wind energy systems can fulfill a valuable______(65)in meeting the energy needs of industrialized nations and of the developing world.
_________(55)
A:sea animals
B:sea plants
C:sea life
D:sea birds
查看答案
If you made a list of all the jobs performed by the different kinds of energy,you would fill many pages.
Nuclear energy is used in some areas of the United States.But there are dangers.Waste materials from nuclear______(51)would destroy life if they leaked______(52)the land.When nuclear energy is produced,a lot of______(53)is produced,too,50 a flow of lake or ocean water 15 used to cool the operations.Then the water______(54)to its source.If the returning water were too hot,it would destroy fish and other______(55).
Cow manure is being used to produce a kind of______(56).The manure from farms is put into a machine to convert it to a liquid.Then the gas 15 formed______(57)a natural process.If the converter were not 50______(58)at the present time,it would be used in many places to provide______(59).
Garbage has become an energy source.It______(60)to oil,steam,or electricity,or it is used on the land.
But recent______(61)about power supplies has led to increased interest in the use of wind______(62)a source of electrical power.Windmills are clean and they______(63)no waste.And they use a______(64)resource.Some scientists consider that wind energy systems can fulfill a valuable______(65)in meeting the energy needs of industrialized nations and of the developing world.
_________(55)
A:sea animals
B:sea plants
C:sea life
D:sea birds
The view from my bedroom window was absolutely spectacular.
A:general
B:traditional
C:magnificent
D:strong
查看答案
A:general
B:traditional
C:magnificent
D:strong