题目内容
（请给出正确答案）
Before we administer first aid to avictim．it is very important for us
A．to refer to all kinds ofhandbooks on first aid．
B．to make sure what to do and what not to do．
C．to remove the ring or bracelet he may be weaning．
D．to take him to a hospital at once．
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更多“Before we administer first aid…”相关的问题
A、Up to 15 days.
B、About 5 business days.
C、Less than 5 days.
D、More than 15 days.
Good Writing
Like fine food。good writing is something we approach with pleasure and enjoy from the first taste to the last．__________ (1) Quite the contrary, just as the cook has to undergo an intensive training，mastering the skills of his trade，the writer must sit at his desk and devote long hours to achieving a style. in his writing，whatever its purpose--school work，matters of business，or purely social communication．__________ (2)
There are still some remote places in the world where you might find someone to do your business or social writing for you，for a fee．There are a few managers who are lucky enough to have the service of that rare kind of secretary who can take care of all sorts of letter writing with no more than a quick note to work from．__________ (3)
We have to write school papers，business papers or home papers．We are constantly called on to put words to paper．It would be difficult to count the number of such words，messages，letters。and reports put to the mails or delivered by hand，but the daily figure must be enormous．__________ (4)We want to arouse and hold the interest of readers．We want whatever we write to be read，from first word to last。not thrown into some “letters-to-be-read” file or into a wastepaper basket．__________ (5)
A．But for most of US，if there is any writing to be done，we have to do it ourselves．
B．However, the managers may sometimes cause the writers a lot of trouble．
C．Any good writers，like good cooks，do not suddenly appear full-blown(成熟的)．
D．What is more，everyone who writes expects，or at least hopes，that his writing will be read．
E．This is the reason we bend our efforts toward learning and practicing the skills of interesting，effective writing．
F．You may be sure that the greater the effort，the more effective the writing，and the more rewarding．
第 46 题 请选择（1）处最佳答案。
A．result
B．judgment
C．decision
D．event
A．unrecognized and untreated depression
B．a character flaw
C．normal sadness and grief
D．a definite possibility
E．dependency and disability
F．a significant risk factor
A．lung and stomach problem.
B．migraine headache.
C．anxiety disorder.
D．allergic condition.
A．medical advancement.
B．legal progress.
C．social stability.
D．material wealth.
A．findings of other historians
B．documents created at the present time
C．his own inferences
D．sound historical materials
Regeneration of Limbs
Most people would agree that it would bewonderful if humans could regenerate limbs．Those who have lost their arms orlegs would be complete again．The day is still far off when this might happen．Butin the last l o years，doctors have reported regeneration in smaller parts of the body,most often fingers．
Regeneration is not a newly-discoveredprocess．For centuries，scientists have seen it work in some kinds of animals．Breakoff a lizard's(蜥蜴的)tail，for example，and it will grow a new tail．Scientists noware looking for a way to turn on this exciting ability in more highly-developedanimals，including humans．Their experiments show that nerves，cell chemistry andthe natural electric currents in the body all seem to have a part in this process．
The body of every animal contains generalpurpose cells that change into whatever kind of cells the body needs．Animalssuch as the lizard or salamander(蝾螈)use these cells to regenerate a new tail．orleg when the old one is broken off．These cells collect around the wound．Theyform. a mass called a blastema(胚基)．The cells of the blastema begin to change．Somebecome bone cells，some muscle cells，some skin cells．Slowly，a new part regrowsfrom the body outward．When completed．the new part is just like the old one．
More than 2oo years a9o。Italian scientistLuigi Spallanzani showed that younger animals have a greater ability toregenerate lost parts than older animals。So do animals lower on the ladder ofevolutionary development．The major difference seems to be that less-developedanimals have more nerves in their tails and legs than humans do in their armsand legs．
Another helpful piece of information wasdiscovered in the late l 8oos．Scientists found that when a creature is injured．anelectrical current flows around the wound．The strength of the current dependson how severe the wound is and on how much nerve tissue is present．
In l 945，American scientist Meryl Rosetested another idea about regeneration．He thought a new limb might grow onlyfrom an open wound．Doctor Rose cut off the front legs of some frogs，below theknee．He kept the wounds wet with a strong salty liquid．This prevented skin fromgrowing over the wounds．The results were surprising．Frogs do not regenerate newlegs naturally．But these frogs began to grow new limbs．About half of eachcut—off leg grew back again．New bones and muscles developed．
This research has led doctors to new waysof treating cut-off fingers．Doctors have observed，for example，that manychildren and some adults will regrow the top of a finger if the wound is leftopen．
第 31 题 The passage indicates that
A．humans can never regenerate limbs．
B．humans might be able to regenerate limbsin the future．
C．human limbs may be regenerated on someanimals first．
D．regeneration of human limbs will SOON become a reality．
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