单项选择题

A．Fifteen cigarette lighters.
B．Fifty cigarette lighters.
C．Sixty lipsticks.
D．An identity car
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单项选择题
A．A businessman in a store.B．A wander in the street.C．Amateur detective.D．A policeman with plain clothes.
A．A businessman in a store.
B．A wander in the street.
C．Amateur detective.
D．A policeman with plain clothes.
填空题
Researches in the wild field evaluating the two most common Bt corn plants showed that the toxin absorbed was too______.
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