What does the passage mainly discuss? The purpose of the second mention of "hormones" in line 4 is to point out

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问题 What does the passage mainly discuss?
The purpose of the second mention of "hormones" in line 4 is to point out

选项 A、chemical signals that are common among insects
B、specific responses of various species to chemical signals
C、similarities between two chemical substances
D、how insects produce different chemical substances

答案C

解析

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托福（TOEFL）

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What does the passage mainly discuss? The purpose of the second mention of "hormones" in line 4 is to point out

托福（TOEFL）

Completethesummarybelow.ChooseNOMORETHANTWOWORDSfromthepassageforeachanswer.Writeyouranswersinboxes22-26on

Youshouldspendabout20minutesonQuestions15-26whicharebasedonReadingPassage2below.Anexaminationofthefunction

RunningonemptyArevolutionarynewtheoryinsportsphysiology.AForalmostacentury,scientistshavepresum

Youshouldspendabout20minutesonQuestions14-26whicharebasedonReadingPassage2below.CHILDREN’SLITERATUREStoriesa

TacklingHungerinMsekeniATherearenotenoughclassroomsattheMsekeniprimaryschool,sohalfthelessonstakeplaceinth

LivingDunesWhenyouthinkofasanddune,youprobablypictureabarrenpileoflifelesssand.Butsanddunesareactuallydyn

Theuniversityhasproduceda______toinformstudentsaboutthedifferentaccommodationoptionsavailable.Thisisthebesta

interacting／interaction本题有关保守性文化课堂的教学方式。录音原文的keepingquiet、nottalking是题目中Littleornotalking的同义表述。or前后连接并列结构，由于前面是动词talk的动名词形式

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