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17,
17, from China
Expert
14,
14, from Austria
Expert
数学填辅助线我一点儿也不会，谁来救救我这个初二的学生
16,
16, from China
Expert
数学填辅助线我一点儿也不会，谁来救救我这个初二的学生
多熟悉一下基本图形，八字，A字等等，不过有的时候还是凭感觉哈哈哈哈哈哈
17,
17, from China
Enthusiast
17,
17, from China
Expert
如何用乙炔和适当的有机无机试剂，合成3-甲基-3-氯-1-丁炔，要求三步反应以内
16,
16, from Antarctica
Expert
15,
15, from Greece
Expert
我高中数学超差
如果你认真思考一下，数学真的很简单又有趣！
16,
16, from China
Expert
如果你认真思考一下，数学真的很简单又有趣！
有趣赞同
但不简单哈哈哈哈哈哈
15,
15, from Greece
Expert
17,
17, from China
Enthusiast
14,
14, from Austria
Expert
17,
17, from China
Expert
直链淀粉转化为支链淀粉的过程是属于物理变化吗？
化学变化，有空间构象改变
16,
16, from Antarctica
Expert
17,
17, from China
Expert
17,
17, from China
Expert
谁帮我速通高中理化
化学我还凑合，物理咱自己都整不明白力😭
18,
18, from China
Casual
数学填辅助线我一点儿也不会，谁来救救我这个初二的学生
辅助线的话可以考虑中线，延长线，垂线，倍长中线，平行线这些
16,
16, from China
Expert
有没有学AP physics1的，真的非常需要帮助
