题目

A； Pacific Bell. May I help you? B： 51 ______ A： May I ask why? B； Well, I’m moving house* I’ve just graduated, and I’m moving to California for a new job there. A： 52 ______ B： Thanks. And my phone number is 320-428-7859. A： Oh，I got it And the name on the account ，please? B： Edward Ryefield. That is R-Y-E-F-I-E-L-D. A： 53 ______ B： It’sJune5，1988. A： 54 ______ B： August 9，by 5 pm. A： No problem. B： Oh, yes, one more thing. I have a monthly pre-paid home phone plan with yoa Can I have some of my money back? A： 55 ______ B： That’s too bad10．下列运算正确的是（　　）A．a0=1B．$\sqrt{9}$=±3C．（ab）2=ab2D．（-a2）3=-a6