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TOEFL
/
Listening practice
/ Section 3LUN
Listen to an Academic Talk
Listen to part of a talk.
Listen
47. Why does the speaker emphasize using multiple samples?
A
To ensure that every tree has responded identically to its surroundings.
B
To assess whether a proposed match has adequate support.
C
To find a single narrow ring shared by unrelated trees.
D
To replace the need for any comparison of ring widths.