www.usk12.com学而美美国K12教育
PartB
WhichphrasefromthepassageBESTdescribeshowbiologicalorganismsproduce
light?
A.organismslightup
B.achemicalreaction
C.specialmolecules
D.sametemperature
9.Selectthesentencesfromthepassagethatprovideanexampleofcauseand
effect.Selectallthatapply.
A.OnawarmsummereveningintheAmericanMidwest,it’snotunusualtosee
hundredsoftinylightsflickeringoveragrassyfield.
B.Onceitbecomesanadult,itcannolongerproduceitsownlight.
C.Scientistshavediscoveredatleast50differenttypesofmushroomsinplacesacross
AustraliaandNorthAmericathatcanglowinthedark.
D.Whentheycombine,achemicalreactiontakesplaceandabrilliantflashoflightis
released.
E.So,ifyouweretoholdafireflyinyourhand,theinsectwouldstaythesame
temperatureevenwhenitisglowing.
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