45′定时训练(4)阅读理解ABeforetheopeningoftheCapeCodCanalin1914,theonlywayshipscouldleaveBostonwasonaroutearoundRacePoint—thenortherntipofCapeCod
However,navigationduringthe18thcenturywasanightmare,becausethefloatingcrosscurrent(交叉气流)aroundRacePointcausedcountlessaccidents
Sobuildingalighthousetolightentheplacewasverynecessary
Asearlyas1808,thepeopleofProvincetownrequestedalighthouseonRacePoint,butittookCongresseightyearstoreactwhentheyfinallypaid$8,000onApril27,1816tobuildalighthouse—RacePointLight,whichwaslocatedinthetownofProvincetown,Massachusetts
Itwasfirstbuiltofstone25feethighwithnofoundationanditslightwas30feetabovethesea
Itwasequippedwithoneofthenation'searliestrevolvinglights
Actually,thereweretwootherlighthousesonCapeCod,buttheywerehitbyastorminOctober1841
Inthefollowingyear,RacePoi