协定存款基本存款额度为日均余额不低于人民币（）万元。A、1 B、5 C、10 D、20

在不考虑优先股息时，融资决策中的总杠杆能够表达企业边际贡献与税前盈余的比率。( )

分选效率最高的是（）。

A、干法选煤

B、浮游选煤

C、跳汰选煤

D、重介质选煤

______ from other continents for millions of years, Australia has many plants and animals

not found in any other country in the world.[ ]

A. Being separated

B. Having separated

C. Having been separated

D. To be separated

(1)厂家将其产品赠给某体育代表团饮用；(2)某企业购买了一项专利；(3)运动员称他的体能恢复得益于某种保健品；(4)研制出一种新型营养配方；(5)生产出一种保健饮品

A．4-5-1-2-3

B．2-4-5-1-3

C．2-5-1-3-4

D．4-2-5-1-3

After people have learned that magnets attract things, centuries passed______they took note of the fact that magnets sometimes also repel things.

A．before

B．until

C．after

D．since