关于凝血因子特性的叙述，错误的是
A
暂无解析
写信(40points)
Writealetteraccordingtothefollowingsituation:theWenchuanearthquakehasmadethiswinterextremelydifficultforthevictims.WritetotellyourfriendSmiththatyouareraisingmoneytobuy200piecesofcotton-paddedclothingandsomeothernecessitiesfortheearthquakevictims.Askhimtojointhecharityandshowyourappreciationsforhishelp.Don’tforgettotellhimyourphonenumber555-5555forfurtherdiscussion.PleasesignyournameasLiPing.(150-200words)
Ifyouaretoo________ofyourchildren,theywillneverlearntodealwithdifficultiesinlife.
Theprofessoraskedaquestion,andDavid________agoodanswer.