（19）如果A为整数且|A|>=10,则打印“OK”，否则打印“Error”,表示这个条件的单行格式If语句是 A.If

（19）如果A为整数且|A|>=10,则打印“OK”，否则打印“Error”,表示这个条件的单行格式If语句是 A.If Int(A)=A And Sqr(A)>=10 Then Print“OK”Else Print “Error” B.If Fix(a)=A And Abs(a)>=10 Then Print“OK”Else Print “Error” C.If Int(A)=A And (A>=10 ,A=-10) Then Print“OK”Else Print “Error” D.If Fix(A)=A And A>=10, Abs A<=-10 Then Print“OK”Else Print “Error