(x+13)(x-13)=x2-19.
故答案为:x2-19.
-Which of the caps will you take?-I'll take _________,one is for my father, the other for my brother.[ ]
A. neither
B. both
C. all
D.too
应针对潜在损失不断增大的风险,商业银行应早期加以防范,及时采取()降低风险和损失程度。
A.控制程序
B.控制措施
C.数据分析
D.评估手段