What does the passage mainly discuss? According to the passage, the most dramatic change to the oceans caused by plankton duri

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问题 What does the passage mainly discuss?
According to the passage, the most dramatic change to the oceans caused by plankton during the Cretaceous period concerned

选项 A、the depth of the water
B、the makeup of the sediment on the ocean floor
C、the decrease in petroleum-producing sediment
D、a decline in the quantity of calcareous ooze on the seafloor

答案B

解析

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托福（TOEFL）

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What does the passage mainly discuss? According to the passage, the most dramatic change to the oceans caused by plankton duri

托福（TOEFL）

Youshouldspendabout20minutesonQuestions15-27,whicharebasedonReadingPassage2below.NAT

Wilkinsonsuggeststhatconservationists’concernabouttheislandismisguidedbecause

Completethesummaryusingthelistofwords/phrases,A-l,below.ProblemsforpreschoolusersofvideogamesPr

Youshouldspendabout20minutesonQuestions1-13,whicharebasedonReadingPassage1below.AAmericanstodaychooseamong

LivingDunesWhenyouthinkofasanddune,youprobablypictureabarrenpileoflifelesssand.Butsanddunesareactuallydyn

ClassifythefollowinginformationasreferringtoAadoptedthewritingsystemfromanothercountryBusedorganicmaterialst

Thestoryillustratesthatdogsare______animals.【20】

Completethesentencesbelow.WriteONEWORDAND/ORANUMBERforeachanswer.Themaximumtimeofcleaningserviceis______

Whichofthefollowingquestionsdoesthepassageprimarilyanswer?Theword"key"inline7isclosestinmeaningto

GeorgiaO’Keeffeisknownfor(hers)use(of)organic,abstract(forms)paintedinclear,(strong)colors.

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在个人业务知识提高方面，你有什么计划?

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