2022年职称英语考试完型填空试题训练(八)

2022年职称英语考试完型填空试题训练(八)ABiologicalClock

Everylivingthinghaswhatscientistscallabiologicalclockthatcontrolsbehavior.Thebiologicalclocktells_____1___whentoformflowersandwhentheflowersshouldopen1.Ittells_____2____whentoleavetheprotectivecocoon茧andflyaway,andittellsanimalsandhumanbeingswhentoeat,sleepandwake.

Eventsoutsidetheplantandanimal_____3_____theactionsofsomebiologicalclocks.Scientistsrecentlyfound,forexample,thatatinyanimalchangesthecolorofitsfur____4_____thenumberofhoursofdaylight.Intheshort____5___ofwinter,itsfurbecomeswhite.Thefurbecomesgraybrownincolorinthelongerhoursofdaylightsummer.

Innersignalscontrolotherbiologicalclocks.Germanscientistsfoundthatsomekindofinternalclockseemstoorderbirdstobegintheirlongmigration_____6____twiceeachyear.Birds_____7_____flyingbecomerestlesswhenitistimeforthetrip,____8___theybecomecalmagainwhenthetimeoftheflighthasended.

Scientistssaytheyarebeginningtolearnwhich____9____ofthebraincontainbiologicalclocks.AnAmericanresearcher,MartinMoorhead,saidasmallgroupofcellsnearthefrontofthebrain____10____tocontrolthetimingofsomeofouractions.These____11____tellapersonwhento_____12_____,whentosleepandwhentoseekfood.Scientistssaythereprobablyareotherbiologicalclockcellsthatcontrolotherbodyactivities.

Dr.Moorheadisstudying_____13____ourbiologicalclocksaffectthewaywedoourwork2.Forexample,mostofushavegreatdifficultyifwemustoftenchangetodifferentworkhours._____14____cantake3manydaysforahumanbodytoacceptthemajorchangeinworkhours.Dr.Moorheadsaidindustrialofficialsshouldhaveabetterunderstandingofbiologicalclocksandhowtheyaffectworkers.Hesaid____15____understandingcouldcutsicknessandaccidentsatworkandwouldhelpincreaseafactory’sproduction.

1.A)scientistsB)humansC)plantsD)animals

2.A)insectsB)birdsC)fishD)snakes

3.A)effect,到达B)affect影响C)effectedD)affected

4.A)becauseB)forthereasonthatC)becauseofD)since

5.A)monthsB)daysC)minutesD)weeks

6.A)flightB)flyC)movementD)transportation

7.A)preventedfrom阻挡,阻碍B)orderedbyC)helpedbyD)intrudedon

8.A)andB)butC)thereforeD)however

9.A)portionsB)partsC)sectionsD)kinds

10.A)tryB)triesC)seemD)seems

11.A)thingsB)partsC)cellsD)actions

12.A)awakenB)wakeC)awakeningD)wake-up

13.A)howB)whyC)where