下列哪些情形构成信用卡诈骗罪？（）A、甲使用已经作废的信用卡购物 B、乙借用杨某的信用

物体从某一高度自由下落，第1s内就通过了全程的一半，物体还要下落多少时间才会落地（　　）

A．1s

B．1.5s

C．

D．（

The newcomer went to the library the other day in search of ____________he could find about

Mark Twin.

A．wherever

B．whatever

C．whoever

D．however

Mother asked the youngest girl _________ with her toy car.

A．what the matter was

B．what was the matter

C．what the matter is

D．what is the matter

三相鼠笼式异步电动机长期连续运行时，转轴所输出的最大转矩，或者说电动机在额定负载时的转矩，叫做电动机的（）。

A、工作转矩

B、正常转矩

C、额定转矩

D、满载转矩

试分析回扣与折扣的区别。