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答案
CHAPTER4
3练习：
A.用括号内的词将汉语译成英语:
Theresearchaboutthisenzymecanbetracedbackto1970s.
Recently,theuseofreproducibleresourcehasreachednewheights.
Vinegarcouldplayonthetastebuds.
Payattentiontotheharmonyofappearance,smell,taste,texturewhenconfectingthebeverage.
B.根据课文判断下列陈述是否正确：
T
T
T
F
F
T

CHAPTER5
4练习：
用表内提供的词组合成句子，描述图中勺的相对位置：
Sevenspoonsaresymmetricallyandevenlyspaced.Perforatedspoonwithblackhandisatthefarleftandgoestotheleftofperforatedspoonwithstainlesssteelhand.Slottedspoonswithblackhandisnexttoperforatedspoonwithstainlesssteelhandontherightandgoestotheleftofslottedspoonwithstainlesssteelhand.Three-corneredstirringspoonisnexttoslottedspoonwithstainlesssteelhandontherightandgoestotheleftofsolidspoonswithblackhand.Solidspoonswithstainlesssteelhandisatthefarright.
2)根据Fig5-3描述其余不同用具相对于球形切割器Ballcutter的位置
Oneballcutterisplacedhorizontallybelowthecenteroftheplace,andastraightspatulagoestothetop-leftofit.Nexttothestraightspatulaontherightisacook’sfork.Infrontofthestraightspatulaisanoffsetspatula.Apieserverisontherightoftheoffsetspatulaandinfrontofthecook’sfork.

CHAPTER6
3练习：
A．用建议的词进行汉译英
Maketheeyelevelevenwiththebottomofmeniscusinsidethetube.
Theelectronicscalesshouldbeplacedwheretheysetlevelandwheretheyreceiveaminimumamountofjarring.
UsethismethodtoanalyzetheargininethroughHPLC,thelinearityrangeisfrom0.5gto10g.
Portion100ounceflourinto5fractions.
Thecolumnis2inchindiameterand10inchinhighness.
B.用表内的词填空
Allmatter,gas,liquidorsolidhasdensity.Thedensityofamaterialisitsmassdividedbyitsvolume(m/v).Densityismeasureding/cm3orkg/m3anddenotedby.Thedensityofpurewaterat4Cisexactly1g/cm3.
Anelectronicscaleandarulerareneededintheexperimentofmeasuringdensityofacircularcylinderjelly.Thevolumeismeasurewitharulerandtheweightismeasuredbyelectronicscale.Thedensityiscalculatedwiththeformula=m/v.
C.区别不同应用场合下的描述方法
Lookatthesethreeexamples:
AninstructionAdemonstrationAreportUseCO2onelectrical.WeuseCO2onelectrical.CO2wasusedonelectricalfires.Nowdescribeasimilarexperimentforfindingthede