Fundamentals of Forest Products Chemical Processing 林产化工专业英语智慧树知到答案2024年东北林业大学

FundamentalsofForestProductsChemicalProcessing林产化工专业英语东北林业大学智慧树知到答案2024年绪论单元测试

Generally,gumrosinisproducedbychemicalprocessingofwoodyrawmaterial.

A:对B:错

答案:B

第一章测试

Traceelementsareessentialtolife.

A:对B:错

答案:AElementswithsimilarchemicalpropertiesgenerallyfallintothesamegroupintheperiodictable.

A:对B:错

答案:AApuresubstancealwayshasthesamephysicalandchemicalpropertiesandiseitheranelementoracompound.

A:错B:对

答案:BCalciumoxideisaninorganiccompounds.

A:错B:对

答案:BAnychemicalspeciescapableofbindingtoelectronpairsiscalledaLewisacid;anymoleculethattendstodonateanelectronpairisreferredtoasaLewisbase.

A:对B:错

答案:AIneithercase,thepositionofthemultiplebondisindicatedbynumberingfromtheendofthechain,startingattheendthatwillassignthelowernumbertothefirstcarbonatomofthemultiplebond.

A:错B:对

答案:BEtherstendtobereactive,andlowmolecularmassethersareoftenusedassolvents.

A:对B:错

答案:BIfoneorbothofthehydrogenatomsontheamidenitrogenatomarereplacedbyhydrocarbongroups,thestructureisnamedasanN-substitutedamide.

A:对B:错

答案:ABydoingresearchinchemistry,wecanfindnewcuresfordiseasesaswellasbetterchemicalstouseinournaturalenvironment.

A:对B:错

答案:A

第二章测试

Wecaneatordrinkinlaboratories

A:错B:对

答案:AIfaliquidgetsintoyoureyes,theeyeshouldbewashedimmediatelywithcleanrunningwaterforatleast10min.

A:对B:错

答案:AInthecaseoffirealarm,weneedstopallofyourongoingwork,turnoffgasandelectricdevices.

A:错B:对

答案:BThereisnoneedtolabelglassorflaskfilledwithsolution.

A:错B:对

答案:AIfyouworkwithflammablesolvent,makesurethereisnosourceofignitioncloseby.

A:对B:错

答案:A

第三章测试

Fossilisedbiomasshas

beenexploitedascoalandoil.

A:错B:对

答案:BTherelativedistributionofphenolicnucleiinligninstronglydiffersbetweenplantspecies.

A:错B:对

答案:BTheroleofhemicelluloseistomodifyandcrosslinkthebasicfibrilsandpromotetheinteractionbetweenotherbiopolymers.

A:错B:对

答案:BSoftwoodsaremainlyvesselmembers,fibres,andparenchyma,andhardwoodsaremainlymadeofmadeoftracheidsandparenchyma.

A:错B:对

答案:BTheouterlayer(S1)isthickerthanThemiddlelayer(S2).

A:对B:错

答案:BKlasonlignin

isastandardanalyticalmethodtomeasurethelignincontentoflignocellulosicbiomass.

A:错B:对

答案:BForesterificationreactionofcellulose,theconversionwaslowandforsilynationreaction,theconversionisgoodbutwithahighcost.

A:错B:对

答案:BCellulosehasmanyhydroxylgroupswhichcanformhydrogenbondinglinkednetworkeasily.

A:错B:对

答案:BHighlyporousaerogelsusuallytendtoshowhigheroil-sorptioncapacities

A:错B:对

答案:BStarchonlyhasoneforms,i.e.amylose.

A:对B:错

答案:BInadditiontoglucomannan,minoramountsofmiscellaneouspolysaccharidesarepresentinhardwoods.

A:错B:对

答案:AThesofteningtemperature(Ts)ofligninsindrystateishigherthanthatinmoistlignins.

A:对B:错

答案:AThereactivityofligninhasnothingtodowithitssolubility.

A:对B:错

答案:BLigninmainlyhastwotypesoflinkagesincludingC-CandC-O-C.

A:对B:错

答案:AThenon-bondedorbitalinteractions(π-πinteractions)ofthearomaticgroupscouldcausedtheassociationofligninmolecules.

A:对B:错

答案:AThearomaticmoietiespresentintheligninstructurewillimprovethemechanicalandthermalpropertiesofepoxyresins.

A:对B:错

答案:ATherearetwodifferenttypesofpolysaccharidehydrolysis,involvingacidic(sulfuricacid)orenzymaticreactions.

A:对B:错

答案:ATerpeneisderivefroma5Ccompound,isoprene.

A:对B:错

答案:APolyphenolsalsocharacteristicallypossessasignificantbindingaffinityforproteins,whichcanleadtotheformationofsolubleandinsolubleprotein-polyphenolcomplexes

A:对B:错

答案:ACardanoldoublebondmaybeepoxidisedorundergoolefin-metathesisreactionwhichmayactasmodifiedmonomerfortheformationofdifferentsetofpolymers.

A:错B:对

答案:B

第四章测试

Sodiumhydroxideandcalciumhydroxidecanbeusedinsteadofpotassiumhydroxidetoneutralizetheacid.

A:错B:对

答案:BHotairblowsintothisdryertobringthesugarshumidityleveldownto0.05percent,thatstandardfortablesugar.

A:错B:对

答案:AThemainresistancetotheflowofheatormasstoasurfacelieswithinthelaminarsublayer.

A:对B:错

答案:AFiltercakesareformedlateinthefluidflow.

A:对B:错

答案:BExtractionmaybeusedtoseparatemorethantwocomponents;andmixturesofsolvents,insteadofasinglesolvent,areneededinsomeapplications.

A:对B:错

答案:AHeatfluxesmaythenbebasedeitherontheinsideareaortheoutsideareaofthechoiceisarbitrary.

A:对B:错

答案:AAnyevaporatorthatusespumptoensurehighercirculationvelocityiscalledaforcedcirculationevaporator.

A:对B:错

答案:AIfthefeedisintroducedatonepointalongthecolumnshell,thecolumnisdividedintoanuppersection,whichisoftencalled

thestrippingsection,andalowersection,whichisoftenreferredtoastherectifyingsection.

A:对B:错

答案:BDryingisanabsolutetermthatmeansacertainvalue.

A:对B:错

答案:B

第五章测试

Thetraditionaltechniquesofsolventextractionofplantmaterialsaremostlybasedonthecorrectchoiceofsolventsandtheuseofheator/andagitationtoincreasethesolubilityofthedesiredcompoundsandimprovethemasstransfer.

A:对B:错

答案:ATheyspraytherubbercubeswithamixofcalciumcarbonateandsolventthemixtureformsthefilmonthecubesthatpreventsmoldandkeepsthemfromstickingtogetherduringtransport.

A:错B:对

答案:BBiomassismostlymadeupofcarbon,hydrogen,compoundsdidnotburncalledash.

A:对B:错

答案:ABiochemicalapproachesincludethreeunit-operationsnamely,pretreatment,hydrolysis,anddistillation.

A:错B:对

答案:AFurfuralcanbeproducedbyaone-steporatwo-stepprocess.Theadvantageoftheone-stepprocessisthat