当需要测设的点位与已知控制点相距较远或不便于量距时，可采用（）。

水利工程档案保管期限分为()。

下列操作不能删除当前图层的是：

DearSir/Madam,

IampleasedtowritealetterofrecommendationonbehalfofSandRiveranditsCEO,Mrs.JaneKing.Iamveryfamiliarwiththecompany.Mynextbookdealswithitindetail,whichistobepublishedinautumnof2018.IamalsofamiliarwithEuropeanconsumer.AsaDutchcitizen,IhavelivedinEuropefor46yearsandstudiedEuropeanconsumerbehaviorfordecades.IbelievethatSandRiverofferssomethinguniquetotheEuropeanmarket.Ithasestablishedlong-termsupplyrelationswithherdsman(牧民)familiesandownsadvancedGermanmachinery.Thusitcombinesnaturalresourceswithmodernmanufacturingtechniques.Butequallyimportant,SandRiverworkswithmodernfashiondesignerstocreatetrulycontemporaryandappealingdesigns.Theresultisanewly-establishedcashmere(羊绒)brandthatappealstoatargetgroupofhigh-incomewomen.ImetMrs.Kingthefirsttimein2013.Sincethen,wehavemetseveraltimesandtalkedaboutSandRiver'sphilosophy,strategy,andappealtobothChineseandinternationalconsumers.Iwasstruckbyherdeepknowledgeaboutknitting(针织)technology,herenthusiasmforthebrand,andherdeepunderstandingofthecashmereshopper.Iregardherasa"womanofherword."Tosummarize,IbelieveSandRiverproductsdeserveaplaceinluxuriousEuropeandepartmentstoresandMrs.Kingisareliablepartner.Ifyouhaveanyquestions,pleasedonothesitatetocontactme.Sincerely,JoanSmith

36、JoanSmithwrotetherecommendationletteronbehalfof______.

A.aDutchcitizen

B.herdsmanfamilies

C.theEuropeanconsumer

D.SandRiveranditsCEO

37、FromtheletterwecanlearnthatSandRiver______.

A.haslong-termlinkswithherdsmen

B.employsmanyherdsmanworkers

C.manufacturesadvancedmachines

D.sellshand-madeproducts

38、Thetargetconsumersofthenewly-establishedcashmerebrandare______.

A.collegestudents

B.blue-colorworkers

C.high-incomewomen

D.averageherdsmanfamilies

39、Bysaying"awomanofherword"(Para.3),thewritermeansthatMrs.King______.

A.alwayskeepsherpromise

B.isagoodpublicspeaker

C.knowscustomerswell

D.iswelleducated

40、AsfarastheEuropeanmarketisconcerned,thewriterthinksthatSandRiverproducts______.

A.arefitforsupermarketsinbigcities

B.arelikelytoenjoyabigmarketshare

C.willappealtodifferentkindsofcustomers

D.deserveaplaceinluxuriousdepartmentstores

下面哪些特性是调节层所具有的（）