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【单选题】
搜集和整理历史资料，从中提取有效信息是学习历史的重要方法。同学从图书馆借来了《三朝实求》、《论军机处与极权政治》、《“文字狱”的研究》等书，准备写一篇历史小论文，下列论文题目最符合他想法的是（）A.
浅议“焚书坑德”
B.
叙说清朝的对外交往
C.
简论“闭关锁国”
D.
略谈清朝的君主专制
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皮皮学刷刷变学霸
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【简答题】阅读理解 It was 25th December. Marie，a 13-year-old Australian girl，was happy.It was Christmas and Marie’s mother was a very special cake.She put four small coins(硬币)into the cake and then baked it....
【简答题】完形块空。 It was December 25, 1972. Marie, a 13-year-old Australian girl, was happy. It was 1 and Marie's mother made an unusual cake. She put four small coins(硬币)into 2 . This four small coins were for g...
【单选题】下列互为共轭酸碱对的是( )
A.
H 3 PO 4 - PO 4 3-
B.
HAc-Ac -
C.
H 2 CO 3 - HPO 4 2-
D.
H 2 PO 4 - - PO 4 3-
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