单项选择题


A．piece
B．type
C．atom
D．measure
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单项选择题
A．formB．inC．ofD．for
A．form
B．in
C．of
D．for
单项选择题
______doesn't contribute to the remarkable long life of these people.
A．Moderate diet
B．Clean mountain air
C．Daily hard work
D．Long physical height
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