单项选择题

A．In population.
B．In the geographical location.
C．In its physical characteristics.
D．Both B and
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单项选择题
A．San Francisco.B．Forest fires.C．Redwood trees.D．Survival skills.
A．San Francisco.
B．Forest fires.
C．Redwood trees.
D．Survival skills.
单项选择题
A．To keep fish alive.B．To punish criminals.C．To preserve dead bodies.D．To help heal wounds.
A．To keep fish alive.
B．To punish criminals.
C．To preserve dead bodies.
D．To help heal wounds.
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