A.日本生态标章
B.北欧白天鹅标章
C.德国蓝天使标志
D.中国环境标志
第7题
A、the force on the glass will be less.
B、the momentum of the paper will be greater.
C、the time for the pull will be less.
D、the coefficient of kinetic friction will be less.
E、None of the others.
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