(单选题)21: 代数式x1 - | a | + ln10 + sin(x2 + 2л ) / cos(57 o )对应的Visual Basic表达式是( ) 。
A: X1 - Abs(A ) + Log(10 ) + Sin(X2+2*3.14 ) / Cos(57*3.14/180 )
B: X1 - Abs(A ) + Log(10 ) + Sin(X2+2*л ) / Cos(57*3.14/180 )
C: X1 - Abs(A ) + Log(10 ) + Sin(X2+2*3.14 ) / Cos(57 )
D: X1 - Abs(A ) + Log(10 ) + Sin(X2+2*л ) / Cos(57 )
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