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TOEFL
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Listening practice
/ Section YMU8
Listen to an Academic Talk
Listen to part of a talk.
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30. How does the speaker distinguish insulation from heat storage?
A
Insulation produces heat, while storage destroys it.
B
Insulation requires heavy walls, while storage requires open windows.
C
Insulation slows transfer, while storage concerns retaining and releasing heat.
D
Insulation works only at night, while storage works only at noon.