在F[x]中，（x-3）2=x2-6x+9，若将x换成F[x]中的n级矩阵A则（A-3I）2=A2-6A+9I.
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What best explains why the banking industry is ready to take advantage of an integrated network infrastructure？（）
A. Many banks are still connecting via dial-up.
B. Many banks need to consolidate departments and resources.
C. Many banks find themselves with an obsolete branch infrastructure.
D. Many banks need back-office process streamlining.
中华人民共和国公民有受教育的（）。
A. 权利
B. 义务
C. 权利和义务
D. 权力
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