对多组平均数的差异进行显著性检验时需计算：（）A.F值 B.t值 C.χ2值 D.Z

瓦特研制的_____为工业革命提供了强大的动力，导致“ _____”的到来。

根据财政政策调节经济周期的作用，财政政策划分为()。

A.自动稳定的财政政策

B.扩张性财政政策

C.紧缩性财政政策

D.相机抉择的财政政策

E.中性财政政策

猪巨吻棘头虫的感染方式为

A．经皮肤

B．直接接触

C．经口

D．输血

E．媒介昆虫叮咬

制作常熟名产“叫花鸡”的原料是（ ）

A．三黄鸡

B．鹿苑鸡

C．惠阳鸡

D．文昌鸡

The development of e-commerce may well bring the world into a brand new era of "electronic currency". At the moment, (52) areas in Europe, the United States and Asia have already started studying the possibility of an electronic currency. Electronic currency is not only about currency. It (53) to an entire finance system on the Net. It includes a virtual numeric currency, an electronic system of withdrawals, transfers and loans, and (54) cards of all shapes and sizes. The (55) of an electronic currency system implies the emergence of "virtual banks" and "virtual enterprises". Actually, the first virtual bank appeared in the US in 1995. (56) it is a small and insignificant bank, it represents the trend of the future. In time to come, we may even have to (57) the familiar paper currency.

As the Net pushes the economy (58) rapidly, the economy is also bringing the Net market forward, resulting in the Internet itself becoming the world’s largest emerging market. Of course, this is just the beginning. Although there are many companies which made huge profits (59) in the Internet market, they tend to be small companies. To date, most companies are making losses. The competition in the knowledge-based economy will also be more (60) This will definitely promote (61) and more efficient cooperation.

58().

A.ahead 

B.backward 

C.front 

D.behind