5、黑。(共15小题;每小题2分,满分30分) A Asanyplanepassengerwillconfirm,acryingbabyisalmostimpossibletoignore,nomatterhowhardyoutry.Nowscientistsbelievetheymayhaveworkedoutwhy.Ababy’scrypullsattheheartstrings(扣人心弦)inawaywhileothercriesdon’t,researchersfound. Researchersfoundthatababy’scrycant