Asisknowntoall,weliveinaworldofgerms（細菌）.Itisimpossible...
問題詳情：Asisknowntoall,weliveinaworldofgerms（細菌）.Itisimpossibletoavoidexposure.Geneticmakeupsmaygivesomepeople____41____advantageoverothers.However,itdoesnotstoppeoplefrombecomingsick.Allofushavebeena...