In 1861 it seemed inevitable that the Southern states would break away from the Union.
A、strangeB
暂无解析
Someseaurchins海胆havevenomous(toxin)spines
HowmanypeopleareawarethatadancerwiththeNewYorkCityBallettypicallywearsoutaminimumoftwohundredpairsoftoeshoesperyear?
Solidgeometryhasenabledastronomerstocalculatethepositionsoftheheavenlybodiesrelativetooneanother.
Thewheelsofthefirstroadvehicleswerefashionedfromcrudestonedisks.
Communicationisoneofthemostimportantbondsthatholdculturalsystemstogether.
