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Trong các khai báo dưới đây khai báo nào hợp lệ A. int a+b
B. int a, b;
C. int a=10, b=20
D. int a, b

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Trong các khai báo dưới đây khai báo nào hợp lệ A. int a+b
B. int a, b;
C. int a=10, b...
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