一度电可供“220V,40W”的灯泡正常发光的时间是__________h

A、20
B、25
C、40
D、50
查看答案
正确答案:

B

答案解析:

暂无解析

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Theaeroplane____shewastravelingwasdelayedforthreehoursatleast.

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Questions 16to 20arebasedonthefollowingpassage:

Morethan30,000driversandfrontseatpassengersarekilledorseriouslyinjuredeachyear.Atthespeedofonly30milesperhouritisthesameasfallingfromathird-floorwindows.Wearingaseatbeltsaveslives;itreducesyourchanceofdeathorseriousinjurybymorethanhalf.

Thereforedriversorfrontseatpassengersover14inmostvehiclesmustwearaseatbelt.Ifyoudonot,youcouldbefinedupto£50.itwillnotbeuptothedriverstomakesureyouwearyourbelt.Butitwillbethedriver’sresponsibilitytomakesurethatchildrenunder14donotrideinthefrontunlesstheyarewearingaseatbeltofsomekind.

However,youdonothavetowearaseatbeltifyoureversingyourvehicle;oryouaremakingalocaldeliveryorcollectionusingaspecialvehicle;orifyouhaveavalidmedicalcertificatewhichexcusesyoufromwearingit.Makesurethesecircumstancesapplytoyoubeforeyoudecidenottowearyouseatbelt.(76)Rememberyoumaybetakentocourtfornotdoingso,andyoumaybefinedifyoucannotprovetothecourtthatyouhavebeenexcusedfromwearingit.

1.Thistextistakenfrom________.

A)amedicalmagazineB)apolicereport

C)alegaldocumentD)agovernmentinformationbooklet

2.Wearingaseatbeltinavehicle________.

A)reducesroadaccidentsbymorethanhalf

B)savesliveswhiledrivingataspeedupto30milesperhour

C)reducesthedeathrateintrafficaccidentsD)savesmorethan15,000liveseachyear

3.Itisthedriver’sresponsibilityto________.

A)makethefrontseatpassengerwearaseatbelt

B)makethefrontseatchildrenunder14wearaseatbelt

C)stopchildrenridinginthefrontseatD)wearaseatbelteachtimehedrives

4.Accordingtothetext,whichofthefollowingpeopleridinginthefrontdosnothavetowearaseatbelt?

A)Someonewhoisbackingintoaparkingspace.

B)Someonewhoispickingupthechildrenfromthelocalschool.

C)Someonewhoisdeliveringinvitationletters.

D)Someonewhoisunder14.

5.Forsomepeople,itmaybebetter________.

A)towearaseatbeltforhealthreasons

B)nottowearaseatbeltforhealthreasons

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It’snecessary_________usallto________

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B、to,keeplearning
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B.theartistbegantodrawatthetailofthehorse

C.theartistmadehisownrule

D.theartistdidnotfollowotherpeople’srule

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A.youdon’tknowwheretobegin

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A.neveraskquestion

B.oftenbeginatthetail

C.shouldwritetheendofthestory

D.shouldthinkofthebeginning

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D.Trusttoyourownpowers

Bythesametoken,regularlysearchingtheInternetallowsyoutobethefirstinlinetoapply______companiespostnewjobopenings.

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