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第三篇In one sense,an al"的相关试题:
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In one sense,an allowance is a child's share of the family income.It can be a good experience that parents can provide for their children.The amount should be what the family can afford.It should be given to the youngsters to do with as they please,but not be used as a tool to win the youngsters' good behaviors.
An allowance is not a bribe.It should be thought of as a learning tool,giving the youngsters firsthand experience in learning how to spend money. It can teach them how to get the best value for what they buy,helping them use their skills in arithmetic.
Many youngsters make mistakes and buy unwisely at first. Some rush out to spend all their money the moment they get it.They forget that once it is spent,there will be no more for several days.From such haste,youngsters can learn how to choose wisely and spend carefully.
Parents need to know when to begin to give an allowance and how much to give.When a youngster starts school,he/she may want it,because his/her friends receive one.A good time for considering it may be when a youngster makes daily requests for ice cream or candy.This will help him/her to see the value of money.
At first a youngster may receive only half an allowance but get it twice a week.This would help someone find a full week too long. She will soon figure out that she can have two candy bars this week,or save for two weeks to buy a toy,learning that she cannot have them both.
A wise parent won't control the child's buying. By making her own mistakes with her own money,the child is more apt to learn from her mistakes.An allowance should not be taken away as punishment for bad behavior,nor as pay for doing household chores（杂务）.
A youngster should be encouraged to be generous,helping her see that money isn't everything. No amount of money can buy friendship.Things such as love and respect do not have a price tag.
We can see that children learn the value of money by________.
A.talking to their parents
B.making mistakes
C.visiting the bank
D.listening to friends
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No one knows exactly how many disabled people there are in the world,but estimates suggest the figure is over 450 million.The number of disabled people in India alone is probably more than double the total population of Canada.
In the United Kingdom,about one in ten people have some disability. Disability is not just something that happens to other people.As we get older,many of us will become less mobile,hard of hearing or have failing eyesight.
Disablement can take many forms and happen at any time of life.Some people are born with disabilities.Many others become disabled as they get older. There are many progressive disabling diseases.The longer time goes on,the worse they become.Some people are disabled in accidents. Many others may have disability in the form of a mental illness.All are affected by people's attitude towards them.
Disabled people face many physical barriers.Next time you go shopping or to work or visit friends,imagine what would you do if you could not get up steps,or on to buses and trains?What would you do if you could not see where you were going or could not hear the traffic?But there are other barriers:prejudice（偏见）can be even harder to break down and ignorance represents by far the greatest barrier of all.It is almost impossible for the able-bodied to fully understand what the disabled go through,so it is important to draw attention to these barriers and show that it is the individual person and their ability,not their disability,which counts.
It can be concluded from the passage that______.
A.we should try our best to prevent disablement
B.we must take a proper attitude towards the disabled
C.the able-bodied people will never fully understand the disabled
D.both physical and mental barriers are hard to break down
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Ants Have Big Impact on Environment as " Ecosystem Engineers"
Research by the University of Exeter has revealed that ants have a big impact on their local environment
as a result of their activity as"ecosystem engineers"and predators.The study,published in the Journal of
Animal Ecology,found that ants have two distinct effects on their local environment?
Firstly.throuah moving the soil by nest building activity and by collecting food they affect the level of
nutrients in the soil.This can indirectly impact the local populations of many animal groups,from decomposers
to species much higher up the food chain.
Secondly,they prey on a wide range of other animals,including larger prey which can be attacked by
vast numbers of ant workers.
Dirk Sanders,an author of the study from the university's Centre for Ecology and Conservation,said,
"Ants are very effective predators which thrive in huge numbers.They're also very territorial and very ag-
gressive,defending their resources and territory against other predators.All of this means they have a strong
influence on their surrounding area."
"In this research,we studied for the first time how big this impact is and the subtleties of it.What we
found is that despite being predators,their presence can also lead to an increase in density and diversity of
other animal groups.They genuinely play a key role in the local environment,having a big influence on the
grassland food web,"Sanders said.
The study,carried out in Germany,studied the impact of the presence of different combinations and den-
sities of black garden ants and common red ants,both of which can be found across Europe,including the
UK. It found that a low density of ants in an area increased the diversity and density of other animals in the
local area,particularly the density of herbivores and decomposers.At higher densities ants had no or the op-
posite effect,the predation counteracting the positive influence.
Dr Frank van Veen,another author on the study,said:"What we find is that the impact of ants on soil
nutrient levels has a positive effect on animal groups at low levels,but as the number of ants increases,their
predatory impacts have the bigger effect一thereby counteracting the positive influence via ecosystem
engineering.
Ants are important components of the ecosystem not only because they constitute a great part of the ani--
mal biomass but also because they act as ecosystem engineers.Ant biodiversity is incredibly high and these
organisms are highly responsive to human impact,which obviously reduces its richness.However,it is not
clear how such disturbance damages the maintenance of ant services to the ecosystem.Ants are important in
below ground processes through the alteration of the physical and chemical environment and through their
effects on plants,microorganisms,and other soil organisms.
What still remains unclear about ants,according to the last paragraph?
A.What roles ants play in the ecosystem in which they live.
B.How ants affect the animal diversity in a given ecosystem.
C.How human activities affect ants'influence on a given ecosystem.
D.How ants alter the physical and chemical environment.
