题目内容
6.Tiny monitoring devices have become an increasingly common way for scientists to study elusive animals that are difficult to track on a day-to-day basis.However,now it seems that smart seals have caught on to the trick and are using it to their advantage to catch fish!To find out if that is true,a team of researchers from the University of St.Andrews in Scotland selected a group of ten young grey seals that had neither encountered the ocean nor been exposed to any kind of acoustic(声音的) tags.The researchers then placed the seals one at a time,inside a pool that contained 20foraging boxes,only two of which housed fish---one with tags and the other without.
Each seal was allowed to explore the boxes twenty separate times.In order to ensure that mammal was not depending on its memory,the fish were moved to different boxes each time.At first,there was no difference in the amount of time it took the seals to discover the tagged and untagged fish.However,after they had been in the pool a few times,they started locating the tagged fish much faster.
To confirm that this indeed was the case,the researchers conducted a second experiment using two boxes---one with pieces of fish and the other with just acoustic tags.Sure enough,the seals were all attracted to the one that was sending out signals.
While this experiment involved only seals,the researchers believe that other marine mammals may also be using the information to catch prey.Sadly,predators like sharks that have been tagged by scientists may be negatively affected,as pings they emit could warn their prey of their presence.Besides potentially messing up nature's food chain,the"dinner bell"effect of the acoustic tags could also mean that the conclusions reached by previous fish studies may not be correct.Now that the secret is out,scientists will have to come up with another way to conduct their studies---one that is not detectable by the crafty marine animals.
28.What does the underlined part"the trick"in Paragraph 1refer to?D.
A.Looking for ways to catch fish.
B.Following the sound that fish make.
C.Tracking sea animals on a day-to-day basis.
D.Attaching tiny monitoring devices to sea animals.
29.After doing the two experiments,the researchers most probably concluded thatC.
A.it's really easy for seals to find their prey
B.seals can be easily fooled by acoustic tags
C.seals can really make use of the acoustic signals to prey
D.seals are much cleverer than most of the other sea animals
30.The researchers seem to believe that sharks tagged by scientistsB
A.may benefit from the tags
B.may find it hard to find prey
C.may attract seals by mistake
D.may be annoyed by the emitted pings
31.Which of the following shows the correct relation among the paragraphs?A
A.①/②③④/⑤
B.①/②/③④⑤
C.①/②③/④⑤
D.①②③④/⑤
分析 研究人员发现,灰海豹可以利用一些安装在鱼身上的跟踪器来捕获猎物.
解答 28.D 词义指代题.根据第一段的Tiny monitoring devices have become an increasingly common way for scientists to study elusive animals可知,the trick指代的是在海洋动物身上安置跟踪器一事.故选D.
29.C 推理判断题.根据第三段的However,after they had been in the pool a few times,they started locating the tagged fish much faster.以及第四段的Sure enough,the seals were all attracted to the one that was sending out signals.可推断,他们得出的结论是海豹确实可以通过跟踪这些跟踪器来捕获猎物.故选C.
30.B 推理判断题.根据第五段的Sadly,predators like sharks that have been tagged by scientists may be negatively affected,as pings they emit could warn their prey of their presence.可推断,这些研究人员似乎相信安装有这种跟踪器的鲨鱼不好捕食.故选B.
31.A.结构题.有全文可知,第一段讲述了科学家们发现灰海豹可以利用一些安装在鱼身上的跟踪器来捕获猎物.二三四段讲了实验过程,最后一段综述这一发现的影响,故选A.
点评 科教类阅读难度比一般阅读较大,它存在的生词比较多,因此考生应当综合略读、跳读和查读,猜词等阅读技巧来做题,平时也应加强练习.
Forever friendshipTwenty-one years ago,my husband gave me Sam,an eight-week-old dog,to help me ease(减轻;缓解) the loss of our daughter.Later my husband and I moved from New York to New Jersey where our neighbor,whose cat had (41)A had kittens,asked us if we would like one.We were afraid that Sam would not be(42)D,but we made up our (43)A to take a kitten.
We picked a little,gray,playful cat.She (44)C around running after imaginary mice and squirrels and jumped from table to chair very (45)B,so we named her Lightning(闪电).
At (46)D,Sam and Lightning were not close to each other.But slowly,as the days went on,Lightning started(47)B Sam.They slept together,ate together and played together.When I took (48)C one out of the house,the other was always (49)A by the door when we returned.That was the (50)C they lived for years.
Then,without any (51)D,Sam suddenly died of a weak heart.This time,there was no Sam for Lightning to greet and no way to (52)B why she would never see her friend again.
In the(53)A that followed,Lightning seemed heartbroken.She could not (54)B me in words that she was (55)C,but I could see the pain and (56)A in her eyes whenever anyone opened the front door.The weeks (57)B by,and the cat's sorrow seemed to be lifting(消失).One day as I walked into our living room,I(58)C to have a look at the floor next to our sofa(59)D we had a sculptured replica(雕塑复制品)of Sam that we had bought a few years before.Lying next to the statue(雕塑),one arm wrapped around the statue's neck,was Lightning,sleeping with her best (60)A.
| 41.A.recently | B.lastly | C.firstly | D.never |
| 42.A.sad | B.excited | C.disappointed | D.glad |
| 43.A.minds | B.hearts | C.heads | D.brains |
| 44.A.walked | B.climbed | C.raced | D.hid |
| 45.A.slowly | B.quickly | C.carefully | D.bravely |
| 46.A.last | B.noon | C.night | D.first |
| 47.A.leaving | B.following | C.hating | D.catching |
| 48.A.neither | B.both | C.either | D.any |
| 49.A.waiting | B.sleeping | C.crying | D.barking |
| 50.A.road | B.path | C.way | D.street |
| 51.A.words | B.diseases | C.fear | D.warning |
| 52.A.talk | B.explain | C.think | D.write |
| 53.A.days | B.weeks | C.seasons | D.years |
| 54.A.express | B.tell | C.report | D.say |
| 55.A.enjoying | B.doing | C.suffering | D.missing |
| 56.A.disappointment | B.anger | C.excitement | D.fun |
| 57.A.came | B.went | C.gathered | D.walked |
| 58.A.seemed | B.appeared | C.happened | D.meant |
| 59.A.what | B.which | C.that | D.where |
| 60.A.friend | B.enemy | C.sofa | D.chair |
My mind was still in thought when (44)BI heard some noise at the entrance doors.There was an elderly woman in a wheelchair and another older woman trying to (45)Dher along.People coming into the lobby were too busy to help them,(46)C them to struggle alone.I jumped to help them.I eased them both sets of doors and rode with them on the (47)B.Then I made sure they found the right office.They thanked me.I told them it was my (48)C.I was on my way down in the elevator (49)A I realized that I had left my backpack on the lobby chair.My backpack had (50)B of value in it.But then I remembered that my library book was also on the chair.
Luckily they were both safely on the chair,just as I had left them.As I sat down,I could feel the beautiful gray-haired woman's (51)D eyes on me.She seemed proud for some (52)A.Then her taxi arrived,and,without a word,she was (53)B.I opened my backpack.To my surprise,(54)C inside my backpack was a fifty-dollar bill!
The beautiful woman with the (55)C look in her eyes suddenly came into my(56)A.I had been kind to a stranger,and (57)D,a stranger had been kind to me.
| 38.A.friendly | B.beautiful | C.powerful | D.generous |
| 39.A.boring | B.strict | C.native | D.former |
| 40.A.received | B.borrowed | C.removed | D.lifted |
| 41.A.school | B.hospital | C.library | D.family |
| 42.A.discussing | B.packing | C.ordering | D.designing |
| 43.A.persuaded | B.told | C.hit | D.beaten |
| 44.A.slowly | B.suddenly | C.finally | D.secretly |
| 45.A.roll | B.carry | C.pull | D.push |
| 46.A.helping | B.suggesting | C.leaving | D.hoping |
| 47.A.wheelchair | B.elevator | C.taxi | D.floor |
| 48.A.duty | B.responsibility | C.pleasure | D.relief |
| 49.A.when | B.until | C.once | D.since |
| 50.A.something | B.nothing | C.anything | D.everything |
| 51.A.grateful | B.sad | C.amazing | D.smiling |
| 52.A.reason | B.excuse | C.thought | D.idea |
| 53.A.lost | B.gone | C.missing | D.moved |
| 54.A.sitting | B.hiding | C.lying | D.living |
| 55.A.funny | B.confident | C.proud | D.foolish |
| 56.A.mind | B.brain | C.head | D.life |
| 57.A.in the end | B.in a way | C.in short | D.in turn |