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TOEFL
/
Listening practice
/ Section 2J6R
Listen to an Academic Talk
Listen to part of a talk in a history of science class.
Listen
30. How was the question of whether a print changes over time settled?
A
By comparing prints from members of the same family
B
By examining prints left at the scenes of crimes
C
By printing the same people again after many years
D
By measuring prints under a microscope