1、【题目】The future survival of the bald eagle is still an important American ecological concern.
选项：
A.migration
B.population
C.existence
D.evolution
答案：
C
解析：
暂无解析
1、【题目】In calculating the daily calorie requirements for an individual, variations in body size, physical activity, and age should be taken into account.
选项：
A.numbered
B.stabilized
C.contrasted
D.considered
答案：
D
解析：
暂无解析
1、【题目】 All living organisms, regardless of their unique identity, have certain biological, chemical, and physical characteristics in common.
选项：
A.asaresultof
B.considering
C.cognizantof(consciousof,awareof)
D.whatever
答案：
D
解析：
暂无解析
1、【题目】Creamoftartar酒石,aweakacid,canbeaddedtoeggwhitestohelpthemfoam泡沫whentheyarebeaten
选项：
A.whipped
B.aged
C.boiled
D.cracked
答案：
解析：
1、【题目】Bythenineteenthcentury,embroideryonmen'sclothinghadvirtuallydisappearedexceptfortheoccasionaldecorativevestandtie.
选项：
A.almost
B.definitely
C.already
D.universally
答案：
解析：
1、【题目】Despitetheproliferationofotherfastermodesoftransportation,therailroadsremainthelargestcarriersofintercityfreightintheUnitedStates.
选项：
A.schemes
B.means
C.tracks
D.variables
答案：
解析：
1、【题目】Although the Carbon 14 method of dating old objects is not foolproof , it is the best method available at present
选项：
A.whollyoperational
B.entirelyserviceable
C.fullyreliable
D.completelysafe
答案：
C
解析：
暂无解析
1、【题目】TheSalkvaccineisamajorfactorinthefighttoeradicatepolio.
选项：
A.completelydestroy
B.carefullydisguise
C.sustain
D.contain
答案：
解析：
1、【题目】Thefirstpaperwasmadefromthebarkofthemulberrytree.
选项：
A.driedwood
B.outercovering
C.syrup(sirup)
D.root
答案：
解析：
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