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题型：单选题 题类：常考题 难易度：普通
河北省秦皇岛抚宁学区2017届九年级上册英语期中考试试卷
— It's not good for their independence. They need to think on their own.
CFCs {#blank#}1{#/blank#} {#blank#}2{#/blank#} to make plastic items.
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