文科历史好难学啊，求指导

找孙燕......

我觉得不难吧…仔细看看优化探究吧！认真听下课，就好了吧

一个学期只学一日呢科目么，不难麽

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┃　┳┛　┗┳　┃ 围观是一种态度
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┃　　　　　　　┃ 围观是为了提高知名度
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