diff --git a/Part1/Chapter3/keepfile.txt b/Part1/Chapter3/keepfile.txt
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diff --git a/Part1/Chapter4/keepfile.txt b/Part1/Chapter4/keepfile.txt
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diff --git a/Part2/Chapter5/5.1 机器学习概述/keepfile.txt b/Part2/Chapter5/5.1 机器学习概述/keepfile.txt
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diff --git a/Part2/Chapter5/5.2 监督学习/keepfile.txt b/Part2/Chapter5/5.2 监督学习/keepfile.txt
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diff --git a/Part2/Chapter5/5.3 无监督学习/keepfile.txt b/Part2/Chapter5/5.3 无监督学习/keepfile.txt
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diff --git a/Part2/Chapter5/简介.md b/Part2/Chapter5/简介.md
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+++ b/Part2/Chapter5/简介.md
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+# 第一章：Python基础知识
+
diff --git a/Part2/Chapter6/6.1 泰坦尼克生还预测/keepfile.txt b/Part2/Chapter6/6.1 泰坦尼克生还预测/keepfile.txt
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diff --git a/Part2/Chapter6/6.2 人脸性别识别/keepfile.txt b/Part2/Chapter6/6.2 人脸性别识别/keepfile.txt
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diff --git a/Part2/Chapter6/简介.md b/Part2/Chapter6/简介.md
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+# 第一章：Python基础知识
+
diff --git a/Part2/简介.md b/Part2/简介.md
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+# 第一章：Python基础知识
+