单项选择题

A．Three.
B．Four.
C．Five.
D．Six.
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单项选择题
A．Enforcing laws contrelling navigation, shipping, immigration and fishing.B．Enforcing laws affecting the privately - owned bests in the U. S.C．Searching for missing beats and rescuing people.D．Training people to good swimmers along the beac
A．Enforcing laws contrelling navigation, shipping, immigration and fishing.
B．Enforcing laws affecting the privately - owned bests in the U. S.
C．Searching for missing beats and rescuing people.
D．Training people to good swimmers along the beac
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