必威体育精装版考研英语完形真题及答案.docxVIP

必威体育精装版考研英语完形练习题及答案

题目

Directions:

Readthefollowingtext.Choosethebestword(s)foreachnumberedblankandmarkA,B,CorDontheANSWERSHEET.(10points)

Theideathatplantshavesomedegreeofconsciousnessfirsttookrootintheearly2000s;theterm“plantneurobiology”was1aroundthenotionthatsomeaspectsofplantbehaviorcouldbe2tointelligenceinanimals.3plantslackbrains,thefiringofelectricalsignalsintheirstemsandleavesnonethelesstriggeredresponsesthat4consciousness,researcherspreviouslyreported.

Butsuchanideaisuntrue,accordingtoanewopinionarticle.Plantbiologyiscomplexandfascinating,butit5sogreatlyfromthatofanimalsthatsocalled6ofplants’intelligenceisinconclusive,theauthorswrote.

Beginningin2006,somescientistshave7thatplantspossessneuronlikecellsthatinteractwithhormonesandneurotransmitters,8“aplantnervoussystem,9tothatinanimals.”They10claimedthatplantshave“brainlikecommandcenters”attheirroottips.

This11makessenseifyousimplifytheworkingsofacomplexbrain,12ittoanarrayofelectricalpulses;cellsinplantsalsocommunicatethroughelectricalsignals.13,thesignalinginaplantisonly14similartothefiringinacomplexanimalbrain,whichismorethan“amassofcellsthatcommunicatebyelectricity,”accordingtothearticle.

Plantbiologyiscomplex,too.Upto400genesinplantscodeforproteinsrelatedtothoseinanimalneurons.What’smore,plantsproducehormonesandneurotransmitterssimilartoanimals.Butthearticlenotesthatplantsdonothaveacentralizedbrainornervoussystem,andthatsignalsintheircellsaregeneratedbyacomplexnetworkofchemicalandelectricalimpulsesthataredifferentfrom15inanimals.

1.A.coined

B.discovered

C.collected

D.issued

2.A.attributed

B.directed

C.compared

D.confined

3.A.Unless

B.When

C.Once

D.Although

4.A.copedwith

B.consistedof

C.hintedat

D.exten