客户让渡价值的含义是什么？
参考答案：
客户让渡价值是指客户总价值与客户总成本之间的差额。
14里面有（ ）个十和（ ）个一。
Before going abroad, she spent as much time as she could_____her spoken English. [ ]
A. practise
B. to practising
C. practising
D. to practise
