单项选择题

A major new area of bioethics is the ethics of health policy and health-resource allocation.

A．exploration
B．expansion
C．distribution
D．possession
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单项选择题
General George Washington and his hungry, ragged troops crossed the Delaware River from Pennsylvania, surprised the garrison of German mercenaries in Trenton, and captured the city.
A．formidable
B．sturdy
C．provocative
D．shabby
单项选择题
By 1916 Canada had played a respectable role on the world stage, a role that would soon help undo its colonial status.
A．decrease
B．remove
C．heighten
D．weaken
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