相关试题
共用题干
Smoking can Increase Depressive Symptoms in Teens
While some teenagers may use cigarettes to "self-medicate"（自我治疗）against the blues（忧郁）,sci-
entists at the University of Toronto and the University of Montreal have found that smoking may actually
______________
(51)depressive symptoms in some teens.
"This observational study is one of the few to examine the perceived ______________(52)benefits of
smoking among teens,"says lead researcher Michael Chaiton,a research associate at the Ontario Tobacco
Research Unit of the University of Toronto."_______________(53)cigarettes may appear to have self-medicating
effects or to improve mood,in the long_______________(54)we found that teens who started to smoke reported
higher depressive symptoms."
As part of the study,some 662 high school teenagers completed up to 20 questionnaires about their use
of cigarettes to ______________
(55)mood.Secondary schools were selected to provide a mix of French and
English participants,urban and rural schools,and schools ______________(56)in high,moderate and low so-
cioeconomic neighbourhoods.
Participants were divided into three
______________ (57):never smokers;smokers who did not use ciga-
rettes to self-medicate,improve mood or physical
______________ (58);smokers who used cigarettes to self-
medicate.Depressive symptoms were measured using a scale that asked how often participants felt too tired
to do things;had
______________ (59)going to sleep or staying asleep;felt unhappy,sad,or depressed;felt
hopeless about the future;felt anxious or tense;and worried too much about things.
" Smokers who used cigarettes as mood
______________( 60 ) had higher risks of elevated（提升）depres-
sive symptoms______________ (61)teens who had never smoked,"says co-researcher Jennifer O'Loughlin,a
professor at the University of Montreal Department of Social and Preventive Medicine."Our study found that
teen smokers who reported emotional benefits from smoking are_______________(62)higher risk of developing
depressive symptoms."
The______________ (63)between depression and'smoking exists______________(64)among teens that use
cigarettes to feel better."It's ______________(65)to emphasize that depressive symptom scores were higher
among teenagers who reported emotional benefits from smoking after they began to smoke,"says Dr. Chaiton.
_________(59)
A:time
B:courage
C:trouble
D:energy
Marsha confessed that she knew nothing about computer.
A:hoped
B:admitted
C:reported
D:answered
共用题干
The Benefits of Lifelong Learning for Adults
Lifelong learning is the process of keeping your mind and body engaged一at any age一by actively pursuing knowledge and experience.In fact,it has many benefits.Firstly,it keeps the mind sharp and it improves the memory.Secondly,it improves self-confidence and offers an opportunity to try something new. Thirdly,it gives the learner the feeling of accomplishment. Also,it offers the learner the opportunity to keep in touch with people who share with him/her the same interests and make new acquaintances.Finally,it offers an opportunity to learn a new skill or trade.
Achieving retirement means having a lot of spare time and becoming more stressed and bored. However,some adults think that learning at that age is a way to get rid of this situation of boredom and stress.For them learning should be a lifelong process and even retirement should be an opportunity to try new things rather than being passive and pessimistic.
Lifelong learning helps you remember things better.
A:Right
B:Wrong
C:Not mentioned
共用题干
The Greatest Mystery of Whales
The whale is a warm一blooded,air-breathing animal,giving birth to its young alive,sucking them一and,
like all mammals,originated on land. There are many________________(51)of this. Its front flippers（鳍状肢）,
used for steering and stability,are traces of feet.
Immense strength is________________(52)into the great body of the big whales,and in fact most of a
whale's body is one gigantic muscle.The blue whale's pulling strength has been estimated________________(53)
400 horsepower. One specimen was reported to have towed（拖）a whaling vessel for seven hours at the
_______________ (54)of eight knot（节）.
An angry whale will________________(55).A famous example of this was the fate of Whaler Essex,
________________(56)was sunk off the coast of South America early in the last century. More recently,steel ships
have ___________( 57 ) their plates buckled（使弯曲）in the same way. Sperm whales（抹香鲸）were known
to seize the old-time whaleboats in their jaws and crush them.
The greatest________________(58)of whales is their diving ability.The sperm whale dives to the bottom foi
his________________(59)food,the octopus（章鱼）.In that search he is known to go as far down as 3 , 200 feet,
where the________________(60)is 1,400 pounds,to a square inch.Doing so he will________________(61)underwa-
ter as long as one hour. Two special skills are involved in this storing up enough________________(62)(all
whales are air-breathed)and tolerating the great change in pressure.Just how he does it scientists have nol
_______________ (63).It is believed that some of the oxygen is stored in a special________________(64)of blood
vessels,rather than just held in the lungs.And it is believed that a special kind of oil in his head is some sort
of a compensating mechanism that________________(65)adjusts the internal pressure of his body.But since you
can't bring a live whale into the laboratory for study,no one knows just how these things work.
_________(62)
A:heat
B:energy
C:food
D:oxygen
共用题干
Less Is More
It sounds all wrong—drilling holes in a piece of wood to make it more resistant to knocks. But it works because the energy from the blow gets distributed throughout the wood rather than fo-
cusing on one weak spot. The discovery should lead to more effective and lighter packaging mate-rials.
Carpenters have known______(51)centuries that some woods are tougher than others. Hickory,for example,was turned into axe handles and cartwheel spokes because it can absorb shocks without breaking. White oak,for example,is much more easily damaued,________(52)it is almostas dense.Julian Vincent at Bathe University and his team were convinced the wood's internal structure could explain the differences.
Many trees have tubular vessels that run_______(53)the trunk and carry water to the leav- es .In oak they are large,and arranged in narrow bands,but in hickory they are smaller,and more evenly distributed.The researchers________(54)this layout might distribute a blow's en-ergy throughout the wood, soaking up a bigger hit.To test the idea,they drilled holes 0.65 millimetres across into a block of spruce,a wood with_______(55)vessels,and found that_______(56)withstood a harder knock_______（57)when there were more than about 30 holes per square centimeter did the wood's performance drop off.
A uniform substance doesn't cope well with knocks because only a small proportion of the material is actually______( 58).All the energy from the blow goes towards breaking the material in one or two places , but often the pieces left _________( 59 ) are pristine（未经破坏的）.
But instead of the energy being concentrated in one place,the holes provide many weak spots that all absorb energy as they break,says Vincent.“You are controlling the places______(60) the wood breaks,and it can then absorb more______(61),more safely.”
The researchers believe the principle could be applied to any material—_________(62)example,to manufacture lighter and more protective packaging.It could_______(63)be used in car bumpers,crash barriers and armor for military vehicles,says Ulrike Wegst,_______(64) the Max Plank Institute for Mental Research in Stuttgart. But she emphasizes that you'd ________(65)to design the substance with the direction of force in mind.“The direction of loading is crucial,”she says.
53._________
A: down
B:.over
C: up
D:.into
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付款人在进行付款时无（）
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B.实质审查义务
C.附带审查义务
D.票据外有关事项的审查义务
根据《公司法》的规定,有限责任公司下列人员中,可以提议召开股东会临时会议的是()。
A.总经理B.人数过半数的股东C.监事会主席D.人数为半数的董事
关于股份有限公司中的监事会，下列说法错误的是()
A.监事会负责提议聘请或更换外部审计机构B.监事会主席和副主席由全体监事过半数选举产生C.监事会中的职工代表的比例不得低于三分之一D.监事会应至少每6个月召开一次会议
阿里巴巴提供了“企业名称认证”“企业身份认证”不同种类的认证,可以根据自身的
