单项选择题


A．formation
B．explosion
C．eruption
D．propulsion
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单项选择题
Until the big gold discoveries in the late nineteenth century ______.
A．most nations adopted the gold standard
B．the trading nations were unable to get enough gold
C．gold coins were used by most nations
D．gold ceased to be an important metal
单项选择题
George Bernard Shaw thought that ______.
A．the members of the government were honest and intelligent
B．the value of gold was likely to change unexpectedly
C．one could place more faith in gold than in politicians
D．gold was more valuable than paper money
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