翻译：
Bymakingvehicleslighterinweightaluminumhasgreatlyreducedtheamountoffuelneededtomovethem,(PassageTwo)
Passage4
Questions16to20arebasedonthefollowingpassage:
Cultureshockisanoccupationaldisease(职业病)forpeoplewhohavebeensuddenlytransplantedabroad.
Cultureshockiscausedbytheanxietythatresultsfromlosingallfamiliarsignsandsymbolsofsocialintercourse.Thosesignsareasfollowing:whentoshakehandsandwhattosaywhenmeetpeople,whenandhowtogivetips,howtomakepurchases,whentoacceptandrefuseinvitations,whentotakestatementsseriouslyandwhennot.Thesesigns,whichmaybewords,gestures,facialexpressions,orcustoms,areacquiredbyallofusinthecourseofgrowingupandasmuchapartofourcultureasthelanguagewespeakorthebeliefsweaccept.Allofusdependonhundredsofthesesignsforourpeaceofmindandday-to-dayefficiency,butwedonotcarrymostatthelevelofconsciousawareness.
Nowwhenanindividualentersastrangeculture,allormostofthesefamiliarsignsareremoved.Nomatterhowbroadmindedorfullofgoodwillyoumaybeaseriesofsupportshavebeenknockedfromunderyou,followedbyafeelingoffrustration.Whensufferingfromcultureshockpeoplefirstrejecttheenvironmentwhichcauseddiscomfort.Thewaysofthehostcountryarebadbecausetheymakeusfeelbad.Whenforeignersinastrangelandgettogetherincomplainaboutthehostcountryitspeople,youcanbesurethattheyaresufferingfromcultureshock.
16.Accordingtothepassage,cultureshockis.
A.anoccupationaldiseaseofforeignpeopleB.mayleadtoveryserioussymptoms
C.actuallynotadiseaseD.incurable
17.Accordingtothepassage,cultureshockresultfrom.
A.thesuddenchangeofsocialatmosphereandcustoms
B.thesuddenchangeofourdailyhabits
C.thesuddenlossofourownsignsandsymbols
D.thediscomfortthatwefeelwhenfacedwithaforeigner
18.Whichoneofthefollowingmaynotbeasymptomofcultureshock?
A.Youdon’tknowhowtoexpressyourgratitude.
B.Youdon’tknowhowtogreetotherpeople.
C.Yousuddenlyforgetwhatawordmeans.
D.Youdon’tunderstandwhyaforeignershrugs.
19.Accordingtothepassage,howwouldapersonwhostaysabroadmostprobablyreactwhenheisfrustratedbythecultureshock?
A.Heismostlikelytorefusetoabsorbthestrangeenvironmentatfirst.
B.Heisreallytoacceptthechangeandadapthimselftothenewenvironment.
C.Althoughhetakestheculturedifferenceforgranted,hestilldoesn’tknowhowtodowithit.
D.Hemaybegintohatethepeopleorthingsaroundhim.
20.Themainideaofthispassageisthat.
A.cultureshockisanoccupationaldisease
B.cultureshockiscausedbytheanxietyoflivinginastrangeculture
C.cultureshockhaspeculiarsymptoms
D.itisveryhardtocopewithlifeinanewsetting
一初产妇，宫缩15小时自娩一3000g女婴，现胎儿娩出已8分钟，胎盘尚未娩出，阴道无流血，此时的处理下列何项不当