银行机构与客户之间签定有关服务方式、费率的契约，可以存在差异。
参考答案：对
问题处理方案的正确而完整的描述称为【 】。
—Did your classmate accept your invitation?
—No, he ____ refused.
A．as far as
B．as well as
C．as soon as
D．as good as
