下列属于融资租赁最主要的外部特征的是______。
A. 可完全补偿
B. 租期长
C. 不可撤销
D. 由承租人负责维护
具有时间短、效果好、易定案的施工图预算审查方法是______。
A. 筛选审查法
B. 标准预算审查法
C. 分组计算审查法
D. 对比审查法
________，businesses offer services for which they charge a fee that is based on the number of transactions they process．
A. In the fee-for-transaction revenue model
B. In the web catalog revenue model
C. In the traditional catalog-based retail revenue model
D. In the advertising-supported revenue model
Stated more formally，an object is simply ________ of a class．
A. a part
B. a component
C. an instance
D. an example
微信支付 
支付宝支付