单项选择题

A．They can store heat.
B．They are thick.
C．They can absorb sweat.
D．They expand when heated.
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单项选择题
A．Use experimental data only.B．Ask people’s opinions on various matters.C．Use statistical data based on scientific models.D．Observe people in real-life situations.
A．Use experimental data only.
B．Ask people’s opinions on various matters.
C．Use statistical data based on scientific models.
D．Observe people in real-life situations.
单项选择题
A．Fashion.B．Music.C．A film.D．A book.
A．Fashion.
B．Music.
C．A film.
D．A book.
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