单项选择题

The gold standard is ______.

A．the average price of gold on the world market
B．a basis for determining the value of currency
C．the amount of gold required by a nation before its currency can be made convertible
D．a means of determining the quality of gold

<上一题目录下一题>

热门试题

单项选择题

We can easily conclude that ______.

A．gold is not as expensive to mine as other metals
B．one trusts gold more than paper money
C．gold is the easier metal to work with
D．gold is the first metal used to determine the value of currency

单项选择题

Which of the following periods saw people develop a more communal form of living

A．Paleolithic
B．Ice Age
C．Mesolithic
D．Neolithic