单项选择题

A．It is being raised each year.
B．It remains constant.
C．It will reach sea level in 9,000 years.
D．It is being lowered gradually.
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单项选择题
A．As young as possible.B．2C．3D．5
A．As young as possible.
B．2
C．3
D．5
单项选择题
The traditional view of human nature was strongly challenged by ________.
A．the emergence of the evolutionary theory
B．the historical approach to man
C．new insight into human behavior
D．the philosophical analysis of slavery
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