1、【题目】The megaphone(microphone) makes the voice sound louder because it points sound waves in one direction and keeps them from spreading out in all directions.
选项：
A.slithering
B.radiating
C.interfering
D.murmuring
答案：
B
解析：
暂无解析
1、【题目】Insect pests are among the leading causes of crop failure.
选项：
A.expected
B.chief
C.natural
D.least
答案：
B
解析：
暂无解析
1、【题目】The economy of Dallas, Texas, is strong and diversified .
选项：
A.inflated
B.stable
C.varied
D.well-regulated
答案：
C
解析：
暂无解析
1、【题目】Themegaphone(microphone)makesthevoicesoundlouderbecauseitpointssoundwavesinonedirectionandkeepsthemfromspreadingoutinalldirections.
选项：
A.slithering
B.radiating
C.interfering
D.murmuring
答案：
解析：
1、【题目】Some animals pant and sweat to speed evaporation of body moisture and thus cool themselves.
选项：
A.wiggle摆动slowly
B.breathequickly
C.rest
D.perspire
答案：
D
解析：
暂无解析
1、【题目】Amythical(imaginary)creature,thedragonwasbelievedtohavelion'sclaws,scalyskin,andfierybreath.
选项：
A.legendary
B.magical
C.frightening
D.perplexing
答案：
解析：
1、【题目】TheSalkvaccineisamajorfactorinthefighttoeradicatepolio.
选项：
A.completelydestroy
B.carefullydisguise
C.sustain
D.contain
答案：
解析：
1、【题目】Thefearofsmallpox,whichterrorizedtheeighteenthcentury,hasnoanalogy(likeness)today.
选项：
A.occurrence
B.remnants残留物
C.witnesses
D.parallel
答案：
解析：
1、【题目】Alllivingorganisms,regardlessoftheiruniqueidentity,havecertainbiological,chemical,andphysicalcharacteristicsincommon.
选项：
A.asaresultof
B.considering
C.cognizantof(consciousof,awareof)
D.whatever
答案：
解析：
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