According to the passage, the blue jeans' popularity was caused by ______.
A.nineteenth-century laborers
B.American film and media
C.the unfolding of popular culture
D.the imaginations of city folk
第1题
A.0.1~0.25
B.0.29~0.39
C.0.2~0.3
D.0.39~0
第7题
A.0.49MPa
B.0.6MPa
C.1.0MPa
D.1.5MPa
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