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【单选题】
已知程序如下,若X=10, Y=20, Z=30,该程序执行完成后,X的值为_____。 X = Z + Y; If Y X = X – Y; } Else{ X= X – Z; } X = X – Y; If X X = X – Z; If X > Y { X = X – Y; }
A.
40
B.
20
C.
10
D.
30
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