单项选择题

Special words used in technical discussion ______.

A．never last long
B．are considered artificial language speech
C．should be confined to scientific fields
D．may become part of common speech
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单项选择题
The cultural elements identified by Landes ______ those identified by other historians.
A．subsume
B．contradict
C．glorify
D．complicate
单项选择题
According to Landes, the main reason that some countries are so poor is that ______.
A．they lack work ethic.
B．they are scientifically backward.
C．they lack rationality
D．they are victimized by colonists.
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