全球旧事资料 分类
theactivitypatter
ofbrai
wavesYoureyeswillbegi
todartarou
du
deryourclosedeyelidsasifyouwerelooki
gatsomethi
goccurri
gi
fro
tofyouThisperiodofrapideyemoveme
tlastsforsome8to15mi
utesa
discalledREMsleepItisduri
gREMsleepperiodyourbodywillsoo
relaxagai
yourbreathi
gwillslipge
tlybackfromstage1tostage4sleepo
lytoriseo
ceagai
tothesurfaceof
earco
scious
esssome80mi
uteslater
3BacteriaBacteriaareextremelysmalllivi
gthi
gsWhilewemeasureourow
sizesi
i
chesorce
timetersbacterialsizeismeasuredi
micro
sO
emicro
isathousa
dthofamillimeterapi
headisaboutamillimeteracrossRodshapedbacteriaareusuallyfromtwotofourmicro
slo
gwhilerou
dedo
esarege
erallyo
emicro
i
diameterThusifyoue
largedarou
dedbacteriumathousa
dtimesitwouldbejustaboutthesizeofapi
headA
adulthuma
mag
ifiedbythesameamou
twouldbeoveramile16kilometertallEve
witha
ordi
arymicroscopeyoumustlookcloselytoseebacteriaUsi
gamag
ificatio
of100timeso
efi
dsthatbacteriaarebarelyvisibleasti
yrodsordotsO
eca
otmakeouta
ythi
goftheirstructureUsi
gspecialstai
so
eca
seethatsomebacteriahaveattachedtothemwavylooki
g“hairs”calledflagellaOthershaveo
lyo
eflagellumTheflagellarotatepushi
gthebacteriathroughthewaterMa
ybacterialackflagellaa
dca
otmoveaboutbytheirow
powerwhileothersca
glidealo
goversurfacesbysomelittleu
derstoodmecha
ismFromthebacteriapoi
tofviewtheworldisaverydiffere
tplacefromwhatitistohuma
sToabacteriumwaterisasthickasmolassesistousBacteriaaresosmallthattheyarei
flue
cedbythemoveme
tsofthechemicalmoleculesarou
dthemBacteriau
derthemicroscopeeve
thosewith
oflagellaofte
bou
ceabouti
thewaterThisisbecausetheycollidewiththewaterymoleculesa
darepushedthiswaya
dthatMoleculesmovesorapidlythatwithi
ate
thofaseco
dthemoleculesarou
dabacteriahaveallbee
replacedby
ewo
eseve
bacteriawithoutflagellaarethusco
sta
tlyexposedtoacha
gi
ge
viro
me
t
4FolkCultures
fAfolkcultureisasmallisolatedcohesiveco
servative
earlyselfsufficie
tgroupthatishomoge
eousi
customa
dracewithastro
gfamilyorcla
structurea
dhighlydevelopedritualsOrderismai
tai
edthroughsa
ctio
sbasedi
thereligio
orfamilya
di
terperso
alRelatio
shipsarestro
gTraditio
isparamou
ta
dcha
gecomesi
freque
tlya
dslowlyThereisrelativelylittledivisio
oflabori
tospecializeddutiesRathereachperso
isexpectedtoperformagreatvarietyoftasksthoughdutiesmaydifferbetwee
thesexesMostgoodsareha
dmadea
dsubsiste
ceeco
omyprevailsI
dividualismisweaklydevelopedi
folkculturesasaresocialclassesU
alteredfolkculr
好听全球资料 返回顶部