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According to the passage the worst disease for human population is______.
单项选择题
A．It originates from the American Indians.B．It has simple themes and melodies.C．It mainly expresses the miseries or Black people and their hard Jives.D．It describes the situations and feelings of the American people.
A．It originates from the American Indians.
B．It has simple themes and melodies.
C．It mainly expresses the miseries or Black people and their hard Jives.
D．It describes the situations and feelings of the American people.
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