ProfessorWang,_______forhisinformativelectures,waswarmlyreceivedbyhisstudents.
Thefloordoesnotlooksobadwhen________(sweep)clean.
设y=y(x)是由方程所确定的隐函数,则 .=
设A为3阶矩阵,为A的属于特征值1的线性无关的特征向量,为A的属于-1的特征向量,则的可逆矩阵P为()
函数f(x)=2x+a/π2(a﹥0),在(0,+∞)内最小值为f(x0)=12,则x0=
Thedirectorrecommendedthatshe________(study)moreEnglishbeforegoingabroad.