单项选择题

During which period did mathematics remain unchanged

A．Ancient times
B．The 17th century
C．For 300 years
D．The Dark Ages
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单项选择题
Which national channel of the BBC broadcasts spots programs
A．Radio One.
B．Radio Two.
C．Radio Three.
D．Radio Four.
单项选择题
Which of the following is NOT mentioned as an effect of the dowry system
A．The husband had to share the power of decision in marriage.
B．The wife was protected from desertion.
C．The wife gained a powerful economic position.
D．The husband was given control over his wife's property.
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