求教og11-rc-8(紫），简单，却让我全军覆没！

珊妮

43, If
a company is already effectively on a par with its competitors because
it provides service that avoids a damaging reputation and keeps
customers from leaving at an unacceptable rate，then investment in higher service levels may be wasted，since service is a deciding factor for customers only in extreme situations.

So choose A.

45, Nor
did they analyze their service improvement to determine whether it
would attract new customers by producing a new standard of service that
would excite customers or by proving difficult for competitors to copy．

So D

47,此题是功能题， 先提出了一个观点，然后举例，所以选E