问答题

The Backbone of North Atnerica refers to the
A．Appalachian Mountains.
B．Rocky Mountains.
C．Cascade Mountains.
D．Sierra Nevada Mountains.

A.Appalachian
B.
B．Rocky
C.
C．Cascade
D.
D．Sierra
E.

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______by Philip Freneau is about his imprisoned experience.
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B．The British Prison Ship
C．The Rising Glory of America
D．The Indian Burying Ground

A.
A．The
B.The
C.The
D.The

Australia is the worlds largest exporter of
A．coal.
B．natural gas.
C．uranium.
D．oil.

A.coal.
B．natural
B.
C．uranium.
D．oil.