Thedetailedanalysesofthirdandfourthquartersalesareincludedin___finalreport
Studentsenrolledasfull-timecanfully____intheuniversityextracurricularclubs.
设二次型f(x1,x2)=x12+4x1x2+4x22经正交变换化为二次型，求ab的值。
Theteamplayedhardbecausethechampionshipofthestatewas______.
Thelittlegirlisignorant_____thebasicrulesofEnglishgrammar。
