题目内容

降低温度液体的粘性增加。

A. 对
B. 错

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升高温度气体的粘度减小。

A. 对
B. 错

This audio file covers the following 13 questions.(注意:专有名词首字母需大写) BBCNews.Hello,thisisJerrySmit.Themanwho(1)_________twopeopletodeathincentralLondonyesterdayhasbeen(2)___________bypoliceasa(3)__________whowasfreedonparolelastyear.UsmanKhanwasshotdeadbyarmedofficersafterhewas(4)_________bymembersofthepublic.TheBritishPrimeMinisterBorisJohnsonsaidhehadlongarguedthatit wasamistaketoletseriousandviolentcriminalsoutofprisonearly.Hesaidthepublic wantedtosee(5) _________inforceforsuch(6)__________.SpeakingtotheBBC,themayorofLondonSadiqKhansuggestedthatcutsinservicesbythegovernmenthadplayedarole.I'veseenpersonallyasaformerlawyer,asa formerjusticesecretary,butalsoasthemayor,the(7) ___________ ofhugecutsinthe (8)_________,theprobationservicebeingprivatized,asidefromthecutsinpoliceandthat musthaveanimpact.Officialshavepraisedthe(9)_________ofthepeoplewho(10)_________ theattacker,someusedimprovisedweapons.SimonJoneshasthedetails.AfterUsman Khanbeganhisattackataconference,weunderstandoneofthe (11)_________tookanornamentaltoothfromawhalewhichwasonthewallandusedthattotrytofendoffhisattack.TheattackerwasthenchasedontoLondonBridge.Membersofthepublicheldhimdown.Onepersonusedthe (12)_________,letitoffinhisfacetotrytokeephimatbayandpeopleheldhimonthe bridgeforaroundfiveminutesuntilthepolicearrivedandtheyshothimdead(13)_________hewaswearingsomesortofbomb.Asforthepeoplewhowereinjured,threeofthemtheyremaininhospitalthismorning.

规范规约中的“可规约串”由()定义

A. 直接短语
B. 最右直接短语
C. 最左直接短语
D. 最左素短语

规范规约是指()。

A. 最左推导的逆过程
B. 最右推导的逆过程
C. 规范推导
D. 最左规约的逆过程

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