The fear of smallpox, which terrorized the eighteenth century, has no analogy(likeness) today.
D
暂无解析
ThefirstimportantexpositionintheUnitedStateswasheldinPhiladelphiain1876.
Eyespots,themostrudimentaryeyes,arefoundinprotozoan原生动物flagellates鞭毛虫,flatworms扁形虫,andsegmentedworms片段蠕虫.
Batsfly,ratherthanglide,andthusaretheonlymammalscapableoftrueflight.
WhileBillieHolidaydidnotinventthemusiccalled"theblues",shemostassuredlyhelpedpopularizeit.
Formerly,intheUnitedStates,manynursesworkedasprivatedutynursesratherthaninhospitals.