The policeman wrote down all the particulars of the accident.
A:secrets
B:details
C:benefits
D:words

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• 共用题干
  Cell Phone Lets Your Secret Out
  Your cell phone holds secrets about you.Besides the names and _____________(51)that you've pro-
  grammed into it,traces of your DNA linger on the device,according to a new study.
  DNA is genetic material that______________(52)in every cell.Like your fingerprint,your DNA is unique
  to you一 _____________（53)you have an identical twin.Scientists today routinely analyze DNA in blood,
  saliva,or hair left _____________(54)at the scene of a crime.The results often help detectives identify
  _____________(55)and their victims.Your cell phone can reveal more about you _____________(56)you might
  think.
  Meghan J.McFadden,a scientist at McMaster University in Hamilton,Ontario,heard about a crime in
  which the suspect bled onto a cell phone and later dropped the______________(57).This made her wonder
  whether traces of DNA lingered on cell phones even when no blood was involved.______________(58)she and
  colleague Margaret Wallace of the City University of New York analyzed the flip-open phones of 10 volun-
  teers.They used swabs to collect______________(59)traces of the users from two parts of the phone:the
  outside,where the user holds it,and the______________(60),which is placed at the user's ear.
  The scientists scrubbed the phones using a solution made mostly______________(61)alcohol.The aim of
  washing was to remove all detectable traces of DNA.The owners got their phones______________(62)for
  another week.Then the researchers collected the phones and repeated the swabbing of each phone once
  more.
  The scientists discovered DNA that _____________(63)to the phone's speaker on each of the phones.
  Better samples were collected from the outside of each phone,but those swabs also picked up DNA that be-
  longed to other people who had apparently also handled the phone.______________(64),DNA showed up even
  in swabs that were taken immediately after the phones were scrubbed.That suggests that washing won't remove
  all traces of evidence from a criminal's device.So cell phones can now be added to the
  ______________(65)of clues
  that can clinch a crime-scene investigation.
  _________(52)
  A:appeals
  B:appoints
  C:appears
  D:applies

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• 共用题干
  Why Buy Shade-Grown Coffee?
  When people argue about whether coffee is good for health,they're usually thinking of the health of the coffee drinker. Is it good for your heart?Does it increase blood pressure?Does it help you concentrate?However,coffee affects the health of the human population in other ways, too.
  Traditionally,coffee bushes were planted under the canopy（树冠）of taller indigenous（土生土长的）trees. However, more and more farmers in Latin America are deforesting the land to grow full-sun coffees.At first,this increases production because more coffee bushes can be plan- ted if there aren't any trees.With increased production come increased profits.
  Unfortunately,deforesting for coffee production immediately decreases local wildlife habitat Native birds nest and hide from predators（捕食者）in the tall trees and migrating birds rest there.
  Furthermore,in the long term,the full-sun method also damages the ecosystem because more chemical fertilizers and pesticides are needed to grow the coffee.The fertilizers and pesti- cides kill insects that eat coffee plant,but then the birds eat the poisoned insects and also die. The chemicals kill or sicken other animals as well,and can even enter the water that people will eventually drink.
  Fortunately,farmers in Central and South America are beginning to grow more coffee bushes in the shade.We can support these farmers by buying coffee with such labels as“shade grown” and“bird friendly.”Sure,these varieties might cost a little more.But we're paying for the health of the birds,the land,ourselves,and the planet. I think it's worth it.
  What is the main idea of this passage?
  A: Farmers are changing the way they grow coffee.
  B:Coffee is becoming more expensive to produce.
  C:Shade-grown coffee is more expensive than sun-grown coffee.
  D: People should buy shade-grown coffee.

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• The student is collecting material for his science report.
  A:data
  B:fabric
  C:substance
  D:supplies

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• 共用题干
  第二篇
  Electric Backpack
  Backpacks are convenient. They can hold your books,your lunch,and a change of clothes,leaving your
  hands free to do other things.Someday,if you don't mind carrying a heavy load,your backpacks might also
  power your MP3 player,keep your cell phone running,and maybe even light your way home.
  Lawrence C.Rome and his colleagues from the University of Pennsylvania in Philadelphia and the
  Marine Biological Laboratory in Woods Hole,Mass.,have invented a backpack that makes electricity from
  energy produced while its wearer walks.In military actions,search-and-rescue operations,and scientific field
  studies,people rely increasingly on cell phones,global positioning system(GPS)receivers,night-vision
  goggles,and other battery-powered devices to get around and do their work. The backpack's electricity-generating
  feature could dramatically reduce the amount of a wearer's load now devoted to spare batteries,report Rome
  and his colleagues in the Sept.Science.
  The backpack's electricity-creating powers depend on springs used to hang a cloth pack from its metal
  frame.The frame sits against the wearer's back,and the whole pack moves up and down as the person
  walks.A gear mechanism converts vertical movements of the pack to rotary motions of an electrical generator,
  producing up to 7.4 watts.
  Unexpectedly tests showed that wearers of the new backpack alter their gaits in response to the pack's
  oscillations,so that they carry loads more comfortably and with less effort than they do ordinary backpacks.
  Because of that surprising advantage,Rome plans to commercialize both electric and non-electric versions of
  the backpack.
  The backpack could be especially useful for soldiers,scientists,mountaineers,and emergency workers
  who typically carry heavy backpacks.For the rest of us,power-generating backpacks could make it possible to
  walk,play video games,watch TV,and listen to music,all at the same time.Electricity-generating packs
  aren't on the market yet,but if you do get one eventually,just make sure to look both ways before crossing
  the street!
  According to Paragraph 4,what does Rome plan to do?
  A:To make the backpack more comfortable for the wearer.
  B:To put the backpack on the market.
  C:To test the advantage of the backpack.
  D:To promote the backpack in a newspaper or on television.

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• 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.
  54._________
  A: discovered
  B: concluded
  C: found
  D:.thought

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