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【多选题】

电影胶片按片基材料可分为():

A.
硝酸片
B.
醋酸片
C.
涤纶片
D.
聚碳酸酯片
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参考答案:
参考解析:
.
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【单选题】Music to My Ears When other shad doubts, my father believed in me. As a boy growing up in Shenyang, China, I practiced the piano six hours a day. I loved the instrument. My mother, Xiulan Zhou, taught...

A.
The whole family moved to Beijing.
B.
He and his father went to Beijing to learn piano.
C.
His mother got iii.
D.
His family objected to his learning in Beijing.