Bacteriaareextremelysmalllivingthings.
Whilewemeasureourownsizesininches
orcentimeters,bacterialsizeismeasured
ronisathousandthof
amillimeter:apinheadisabouta
-shapedbacteria
areusuallyfromtwotofourmicronslong,
whileroundedonesaregenerallyone
youenlargeda
roundedbacteriumathousandtimes,it
wouldbejustaboutthesizeofapinhead.
Anadulthumanmagnifiedbythesame
amountwouldbeoveramile(1.6
kilometer)tall.
Evenwithanordinarymicroscope,you
magnificationof100times,onefindsthat
bacteriaarebarelyvisibleastinyrodsor
notmakeoutanythingof
pecialstains,one
canethatsomebacteriahaveattached
tothemwavy-
looking"hairs"have
gellarotate,
pushingthebacteriathroughthewater.
Manybacterialackflagellaandcannot
moveaboutbytheirownpower,while
otherscanglidealongoversurfacesby
somelittle-understoodmechanism.
Fromthebacteriapointofview,theworld
isaverydifferentplacefromwhatitisto
teriumwaterisasthick
iaaresosmall
thattheyareinfluencedbythe
movementsofthechemicalmolecules
iaunderthe
microscope,eventhowithnoflagella,
becautheycollidewiththewatery
moleculesandarepushedthiswayand
lesmovesorapidlythat
withinatenthofacondthemolecules
aroundabacteriahaveallbeenreplaced
bynewones;evenbacteriawithout
flagellaarethusconstantlyexpodtoa
changingenvironment.
专治男女记不住单词的秘密5天5
夜突破英语听说,100%保证!!——点击
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本47FolkCultures
下一篇:新东方英语背诵文选mp3和文
本49Sleep※相关链接※
·新东方英语背诵文选mp3和文本48
Bacteria
From:
/englisharticle/xind
ongfang/2007-03-26/新东方英
语背诵文选mp3和文本49Sleep
Source:2007-03-26我要投稿论坛
FavoriteSleetispartofaperson'sdaily
reveraldifferent
stagesofsleep,andtheytoooccurin
reanaveragesleeper,your
ufist
driftoffintoslumber,youreyeswillroll
aboutabit,youtemperaturewilldrop
slightly,yourmuscleswillrelax,andyour
breathingwellslowandbecomequite
ainwavesslowand
ainwaves
slowdownabittoo,withthealpha
thenexthalfhourorso,asyourelaxmore
andmore,youwilldriftdownthrough
eryour
yourbrainwaveswill
out40to69minutesafteryou
loconsciousnessyouwillhavereached
ainwill
showthelargeslowwavesthatareknown
stage4sleep.
Youdonotremainatthisdeepfourth
stageallnightlong,butinsteadabout80
minutesafteryoufallintoslumber,your
brainactivitylevelwillincreaagain
tarhythmwilldisappear,
tobereplacedbytheactivitypatternof
eswillbegintodart
aroundunderyourclodeyelidsasifyou
werelookingatsomethingoccurringin
riodofrapideye
movementlastsforsome8to15minutes
ringREM
sleepperiod,yourbodywillsoonrelax
again,yourbreathingwillslipgentlyback
fromstage1tostage4sleep----onlyto
rionceagaintothesurfaceofnear
consciousnesssome80minuteslater.
专治男女记不住单词的秘密5天5
夜突破英语听说,100%保证!!——点击
进入
【推荐】和老外一对一聊天练口语学习
交友的好去处
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豆瓣网新浪微博百度Hi百度搜藏
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上一篇:新东方英语背诵文选mp3和文
本48Bacteria
下一篇:新东方英语背诵文选mp3和文
本ndTemperature※相关链
接※
·新东方英语背诵文选mp3和文本49
Sleep
热点下载推
From:
/englisharticle/xind
ongfang/2007-03-26/新东方英
语背诵文选mp3和文本nd
Temperature
Source:2007-03-26我要投稿论坛
Favorite
Cellscannotremainaliveoutsidecertain
limitsoftemperatureandmuchnarrower
limitsmarktheboundariesofeffective
systemsofmammals
andbirdsaremostefficientonlywithina
narrowrangearound37C;adepartureofa
fewdegreesfromthisvalueriously
ough
cellscansurvivewiderfluctuationsthe
integratedactionsofbodilysystemsare
nimalshaveawider
toleranceforchangesofbodily
temperature.
Forcenturiesithasbeenrecognizedthat
mammalsandbirdsdifferfromother
animalsinthewaytheyregulatebody
characterizingthe
differencehavebecomemoreaccurate
andmeaningfulovertime,butpopular
terminologystillreflectstheolddivision
into"warm-blooded"and"cold-blooded"
species;warm-bloodedincluded
mammalsandbirdswhereasallother
creatureswereconsideredcold-blooded.
Asmorespecieswerestudied,itbecame
evidentthatthisclassificationwas
lizardoradert
iguana-eachcold-blooded----usuallyhasa
bodytemperatureonlyadegreeortwo
belowthatofhumansandsoisnotcold.
Thereforethenextdistinctionwasmade
betweenanimalsthatmaintainaconstant
bodytemperature,calledhome0therms,
andthowhobodytemperaturevaries
withtheirenvironments,called
sclassificationalso
provedinadequate,becauamong
mammalstherearemanythatvarytheir
bodytemperaturesduringhibernation.
Furthermore,manyinvertebratesthatlive
inthedep`hsof`@eo#eafnever`Pperien`
chang!intheepths
n
theoa@anleveexper`ncech`@geInt@e
#hil,oftheDeepwapdr,andhe)p
bh@ytempaaturemahnbnstant&
From:
/englisharticle/xind
ongfang/2007-03-26/e
increaininternationalbusinessandin
foreigninvestmenthascreatedaneedfor
executiveswithknowledgeofforeign
languagesandskillsincross-
ans,
however,havenotbeenwelltrainedin
eitherareaand,conquently,havenot
enjoyedthesamelevelofsuccessin
negotiationinaninternationalarenaas
havetheirforeigncounterparts.
Negotiatingistheprocessof
communicatingbackandforthforthe
involvespersuasionandcompromi,but
inordertoparticipateineitherone,the
negotiatorsmustunderstandthewaysin
whichpeoplearepersuadedandhow
compromiisreachedwithintheculture
ofthenegotiation.
Inmanyinternationalbusiness
negotiationsabroad,Americansare
oftenappearstotheforeignnegotiator
thattheAmericanreprentsalarge
multi-million-dollarcorporationthatcan
affordtopaythepricewithoutbargaining
ricannegotiator'srole
becomesthatofanimpersonalpurveyor
ofinformationandcash.
InstudiesofAmericannegotiatorsabroad,
veraltraitshavebeenidentifiedthat
mayrvetoconfirmthisstereotypical
perception,whileunderminingthe
negotiator'itsin
particularthatcaucross-cultural
misunderstandingaredirectnessand
impatienceonthepartoftheAmerican
rmore,American
negotiatorsofteninsistonrealizingshort-
nnegotiators,onthe
otherhand,mayvaluetherelationship
establishedbetweennegotiatorsandmay
bewillingtoinvesttimeinitforlong-term
rtosolidifythe
relationship,theymayoptforindirect
interactionswithoutregardforthetime
involvedingettingtoknowtheother
negotiator.
From:
/englisharticle/xind
ongfang/2007-03-26/
Accustomedthoughwearetospeakingof
thefilmsmadebefore1927as"silent",
thefilmhasneverbeen,inthefulln
oftheword,every
beginning,musicwasregardedasan
indispensableaccompaniment;whenthe
Lumierefilmswereshownatthefirst
publicfilmexhibitionintheUnitedStates
inFebruary1896,theywereaccompanied
bypianoimprovisationsonpopulartunes.
Atfirst,themusicplayedborenospecial
relationshiptothefilms;an
accompanimentofanykindwassufficient.
Withinaveryshorttime,however,the
incongruityofplayinglivelymusictoa
solemnfilmbecameapparent,andfilm
pianistsbegantotakesomecarein
matchingtheirpiecestothemoodofthe
film.
Asmovietheatersgrewinnumberand
importance,aviolinist,andperhapsa
cellist,wouldbeaddedtothepianistin
certaincas,andinthelargermovie
theaterssmallorchestraswereformed.
Foranumberofyearsthelectionof
musicforeachfilmprogramrested
entirelyinthehandsoftheconductoror
leaderoftheorchestra,andveryoftenthe
principalqualificationforholdingsucha
positionwasnotskillortastesomuchas
theownershipofalargepersonallibrary
heconductor
ldomsawthefilmsuntilthenight
beforetheyweretobeshown(ifindeed,
theconductorwasluckyenoughtoe
themthen),themusicalarrangementwas
normallyimprovidinthegreatesthurry.
Tohelpmeetthisdifficulty,film
distributingcompaniesstartedthe
practiceofpublishingsuggestionsfor
1909,for
example,theEdisonCompanybegan
issuingwiththeirfilmssuchindicationsof
moodas"pleasant","sad","lively".The
suggestionsbecamemoreexplicit,andso
emergedthemusicalcuesheetcontaining
indicationsofmood,thetitlesofsuitable
piecesofmusic,andprecidirectionsto
showwhereonepieceledintothenext.
Certainfilmshadmusicespecially
tfamousof
theearlyspecialscoreswasthat
ith's
filmBirthofaNation,whichwasrelead
in1915.
Note:美国通俗音乐分类:1.Jazz;1)
traditionaljazz----a)blues,代表人物:
BillyHolidayb)ragtime(切分乐曲):代表
人物:ScottJoplinc)NewOrleansjazz(=
Dixielandjazz)eg:LouisArmstron
d)swingeg:GlennMiller,DukeEllington,
etc.e)bop(=bebop,rebop)eg:Lester
Young,CharlieParkeretc.2)modernjazz
------a)cooljazz(=progressivejazz)高雅爵
士乐。Eg:KennyG.b):
CharlesMingus,JohnLewis.c)main
streamjazz.d)avant-gardejazz.e)souljazz.
Eg:SarahVaughn,EllaFitzgeraldf)Latin
music福音音乐,主要源于
arker,Mahalia
.
JohnDenver,TammyWynette,Kenny
Rogers,sic-----------a)rock
androlleg:ElvisPrestley(US),the
Beatles(UK.)b)folkrockEg:BobDylon,
MichaelJackson,MariahCarey,Bruce
Springsteen,LionelRicheetc.c)punkrock
d)acidrocke)rockjazzeg:hlin
f)oreasylistening
From:
/englisharticle/xind
ongfang/2007-03-26/
Theancestryofthepianocanbetracedto
theearlykeyboardinstrumentsofthe
fifteenthandsixteenthcenturies---the
spinet,thedulcimer,
theventeenthcenturytheorgan,the
clavichord,andtheharpsichordbecame
thechiefinstrumentsofthekeyboard
group,asupremacytheymaintaineduntil
thepianosupplantedthemattheendof
vichord's
tonewasmetallicandneverpowerful;
nevertheless,becauofthevarietyof
tonepossibletoit,manycomporsfound
theclavichordasympatheticinstrument
harpsichordwithitsbright,vigoroustone
wasthefavoriteinstrumentforsupporting
thebassofthesmallorchestraofthe
periodandforconcertu,butthe
characterofthetonecouldnotbevaried
savebymechanicalorstructuraldevices.
Thepianowasperfectedintheearly
eighteenthcenturybyaharpsichord
makerinItaly(thoughmusicologistspoint
outveralpreviousinstancesofthe
instrument).Thisinstrumentwascalleda
pianoeforte(sortandloud),toindicate
itsdynamicversatility;itsstringswere
struckbyarecoilinghammerwitha
esweremuch
s
ofmechanicalimprovementscontinuing
wellintothenineteenthcentury,including
theintroductionofpedalstosustaintone
ortosoftenit,theperfectionofametal
frame,andsteelwireofthefinestquality,
finallyproducedaninstrumentcapableof
myriadtonaleffectsfromthemost
delicateharmoniestoanalmost
orchestralfullnessofsound,fromaliquid,
singingtonetoasharp,percussive
brilliance.
NOTE:ings
(弦乐)1)plectrum:harp,lute,guitar,
mandolin;2)keyboard:clavichord,
harpsichord,piano;3)bow:violin,viola,
cello,d(木管)
-winds:piccolo,flute,oboe,clarinet,
bassoon,Englishhorn;ss(铜管):
Frenchhorn,trumpet,trombone,cornet,
tuba,bugle,saxophone;
percussion(打击组):kettledrum,bass
drum,snaredrum,castanet,xylophone,
celesta,cymbal,tambourine.
From:
/englisharticle/xind
ongfang/2007-03-26/
AlthoughHenryFord'snameiscloly
associatedwiththeconceptofmass
production,heshouldreceiveequalcredit
forintroducinglaborpracticesaarlyas
1913thatwouldbeconsideredadvanced
evenbytoday'
measureswereimproved,andthework
daywasreducedtoeighthours,compared
withtheten-ortwelve-hourdaycommon
rtoaccommodatethe
shorterworkday,theentirefactorywas
convertedfromtwotothreeshifts.
Inaddition,sickleavesaswellasimproved
medicalcareforthoinjuredonthejob
dMotorCompany
wasoneofthefirstfactoriestodevelopa
technicalschooltotrainspecializedskilled
laborersandanEnglishlanguageschool
fortswereeven
madetohirethehandicappedand
providejobsforformerconvicts.
Themostwidelyacclaimedinnovation
wasthefive-dollar-a-dayminimumwage
thatwasofferedinordertorecruitand
retainthebestmechanicsandto
discouragethegrowthoflaborunions.
Fordexplainedthenewwagepolicyin
alsomentionedthefactthathis
employeeswouldbeabletopurchathe
automobilesthattheyproduced-ineffect
r
toqualifyfortheminimumwage,an
employeehadtoestablishadecenthome
anddemonstrategoodpersonalhabits,
includingsobriety,thriftiness,
industriousness,anddependability.
Althoughsomecriticismwasdirectedat
Fordforinvolvinghimlftoomuchinthe
personallivesofhimployees,therecan
benodoubtthat,atatimewhen
immigrantswerebeingtakenadvantageof
infrightfulways,HenryFordwashelping
manypeopletoestablishthemlvesin
America.
From:
/englisharticle/xind
ongfang/2007-03-26/
Negotiationn.谈判;转让;[口语]顺利的
通过
counterparts.n.相对物;相对应的人;(契
约)副本
compromi(vt.妥协;危害
vi.妥协;让步
n.妥协,和解;折衷
purveyor[pə'veiə]英汉翻译n.承办商;
伙食承办商;供应粮食者;供应货物或
提供服务的人或公司
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