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【单选题】
下列哪组语句可以将变量 A 、 B 的值互换? ( ) A ) B ) C) D)
A.
A=B:B=A
B.
C=A:A=B:B=C
C.
A=C : C=B : B=A
D.
2 : B= A=(A+B)/ (A-B)/2
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