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判断char型变量c1是否为大写字母的正确表达式是A.'A'<=c1<='Z'B.(c1>=A)&&(c1<=Z)C.('A'
判断char型变量c1是否为大写字母的正确表达式是
A.'A'<=c1<='Z'
B.(c1>=A)&&(c1<=Z)
C.('A'>=c1)‖('Z'<=c1)
D.(c1>='A')&&(c1<='Z')
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