单项选择题

A．By selling services that make life comfortable.
B．By selling land-containing oil.
C．By selling public lands.
D．By selling coal and other natural products.
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单项选择题
A．To give an example that both human beings and animals can recognize faces.B．To tell how a skilled writer could describe all the features of different people.C．To indicate how pigeons and people look different.D．To show how faces are like fingers.
A．To give an example that both human beings and animals can recognize faces.
B．To tell how a skilled writer could describe all the features of different people.
C．To indicate how pigeons and people look different.
D．To show how faces are like fingers.
单项选择题
A．17000B．1700C．70000D．7000
A．17000
B．1700
C．70000
D．7000
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