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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
31. Why does the speaker mention fifty cards instead of ten thousand?
A
To show how large early collections became
B
To explain why some prints were filed twice
C
To make clear what a classification system had to achieve
D
To criticize the accuracy of the early systems