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TOEFL
/
Listening practice
/ Section 7FGS
Listen to an Academic Talk
Listen to part of a talk in a materials engineering class.
Listen
26. According to the speaker, what happens inside the metal as it is bent repeatedly?
A
The crystals grow larger and fewer.
B
The faults in the crystals slide and pile up against one another.
C
The atoms rearrange themselves into a new pattern throughout the whole wire.
D
Heat builds up until the metal softens.