isframed
owa
dha
gsi
mystudySixwordso
e22eachyearofherlifethatspeaktomeofharmo
ycourageu
dema
di
gloveAgiftfromachild23seablueeyesa
dhairthecolorsa
dwhotaughtmethegiftoflove
B
1
f独山子张福华2010年通用英语考试辅导
offori
withtoassuchi
tothatdisposalfrombyoru
tilPetroleumrefi
i
gistheseparatio
ofpetroleum1fractio
sa
dthesubseque
ttreati
gofthesefractio
stomakethem2petroleumproductsMostpetroleumproductsi
cludi
gkerose
esfueloilslubricati
goilsa
dwaxesarefractio
sofhavebee
treatedtoremoveu
desirablecompo
e
tsOtherproductspetroleum3forexamplegasoli
esaromaticsolve
tsa
deve
someasphaltsaretotallyorpartlysy
thetic4thattheyhavecompositio
sthatareimpossibletoachievebydirectseparatio
ofthesematerials5crudepetroleumTheyresultfromselectedportio
sofcrudechemicalprocessesthatcha
gethemolecular
ature6petroleum7otherwordstheyaretheproductsofrefi
i
gortheyarerefi
edproductsRefi
i
gpetroleumisacomplexseriesofsteps8whichtheorigi
alcrudematerialiseve
tuallyco
vertedi
tosalableproductswiththedesiredqualitiesa
dperhapsmoreimporta
ti
theamou
tsdictated9themarketI
factatherefi
eryisesse
tiallyagroupofma
ufacturi
gpla
tsthatvaryi
umber10varietyofproductsproducedrefi
eryprocessesmustbeselecteda
dproductsmustbema
ufacturedtogiveabala
cedoperatio
11iscrudeoilmustbetherateofsaleofeachForexampletheco
vertedi
toproductsaccordi
g12ma
ufactureofproductsfromthelowerboili
gportio
ofpetroleumautomaticallyproducesacertai
amou
tofhigherboili
gcompo
e
tsIfthelatterca
otbesoldrefi
erystoragefacilitiesarefullToasheavyfueloiltheyaccumulate13preve
ttheoccurre
ceof14asituatio
therefi
erymustbeflexiblea
dabletocha
geoperatio
s15
eededThisusuallymea
smoreprocessesacracki
gprocesstocha
gea
excessofheavyfueloili
tomoregasoli
ewithcokeastheresidualproduct16avacuumdistillatio
processtoseparatetheheavyoili
tolubricati
goilstocksa
dasphalttoaccommodatetheevercha
gi
gdema
dsofthemarketI
additio
acompleterefi
i
gi
stallatio
musti
cludethefollowi
gall
ecessary
o
processi
gfacilitiesadequateta
kage17stori
gcrudeoilelectricalpoweri
termediatesa
dfi
ishedproductsadepe
dablesource18materialha
dli
gequipme
tworkshopsa
dsuppliesformai
tai
i
gaco
ti
uous24hoursaday7daysaweekoperatio
waste19a
dwatertreati
gequipme
ta
dproductble
di
gfacilities
C
offorifitfromwiththeaswhatwhothattoi
o
aboutacrossSpeaki
gE
glishflue
tlya
daccuratelyisagoalofma
ypeoplestudyi
gE
glishi
Chi
aFlue
cyca
besimplydefi
ed1