单项选择题

A．Biology.
B．Chemistry.
C．Philosophy.
D．Medicine.
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单项选择题
A．Enforcing laws controlling navigation, shipping, immigration and fishing.B．Enforcing laws affecting the privately-owned boats in the U. S.C．Searching for missing boats and rescuing people.D．Training people to be good swimmers along the beach.
A．Enforcing laws controlling navigation, shipping, immigration and fishing.
B．Enforcing laws affecting the privately-owned boats in the U. S.
C．Searching for missing boats and rescuing people.
D．Training people to be good swimmers along the beach.
单项选择题
A．Her subject’s home.B．Her subject’s social status.C．Her subject’s personality.D．Her subject’s role in history.
A．Her subject’s home.
B．Her subject’s social status.
C．Her subject’s personality.
D．Her subject’s role in history.
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