DoubleEagleinthefirsttransatlanticballoon,wasgreetedbyavidcrowdsinFrance.

• A.eager
• B.surging
• C.appreciative
• D.vigorous

Alllivingorganisms,regardlessoftheiruniqueidentity,havecertainbiological,chemical,andphysicalcharacteristicsincommon.

• A.asaresultof
• B.considering
• C.cognizantof(consciousof,awareof)
• D.whatever

Theflowerbudofawaterlily百合opensatsunsetsince.itsopeningistriggered(commence).bythedecreasedlight.

• A.alleviated减轻
• B.endured
• C.setoff
• D.coveredup

Someanimalspantandsweattospeedevaporationofbodymoistureandthuscoolthemselves.

• A.wiggle摆动slowly
• B.breathequickly
• C.rest
• D.perspire

Foodmustbemoistinordertohaveataste.

• A.appetizing(delicious)
• B.nutritious
• C.damp
• D.chewed

Withlasersscientistscanprobemanyphysicalprocesses,suchascombustion,oncebeyondourken.视野

• A.understanding
• B.responsibility
• C.interpretation
• D.notice