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A．A survey.
B．A Simple technique.
C．A statement.
D．An exampl
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单项选择题
A．Human Basic Needs.B．Material Comfort.C．Food: Human Basic Need.D．Basic Necessities of Lif
A．Human Basic Needs.
B．Material Comfort.
C．Food: Human Basic Need.
D．Basic Necessities of Lif
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