增加了一道附加题，并且修正了部分文字错误

liuhui998 · liuhui998 · commit d3c3d73a56c1 · 2020-07-13T17:03:22.000+08:00
diff --git a/01-variable/answer-questions.ipynb b/01-variable/answer-questions.ipynb
@@ -171,11 +171,11 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 8,
+   "execution_count": 10,
    "metadata": {
     "ExecuteTime": {
-     "end_time": "2020-07-13T08:41:54.500102Z",
-     "start_time": "2020-07-13T08:41:54.496891Z"
+     "end_time": "2020-07-13T08:58:50.891608Z",
+     "start_time": "2020-07-13T08:58:50.888118Z"
     }
    },
    "outputs": [
@@ -195,11 +195,48 @@
     "print(c)"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2020-07-13T09:00:17.331548Z",
+     "start_time": "2020-07-13T09:00:17.328583Z"
+    }
+   },
+   "source": [
+    "## 变量类型 (附加题，不考)\n",
+    "* 猜一下下面两行代码的执行结果：\n",
+    "* print(type(100))\n",
+    "* print(type(\"Hello\"))"
+   ]
+  },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 13,
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2020-07-13T09:00:34.525228Z",
+     "start_time": "2020-07-13T09:00:34.522194Z"
+    }
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "<class 'int'>\n",
+      "<class 'str'>\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(type(100))\n",
+    "print(type(\"Hello\"))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
    "metadata": {},
-   "outputs": [],
    "source": [
     "## Python 开发规范\n",
     "\n",
diff --git a/01-variable/questions.ipynb b/01-variable/questions.ipynb
@@ -53,6 +53,21 @@
     "* 打印出结果"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2020-07-13T09:01:18.014910Z",
+     "start_time": "2020-07-13T09:01:18.011117Z"
+    }
+   },
+   "source": [
+    "## 变量类型 (附加题，不考)\n",
+    "* 猜一下下面两行代码的执行结果：\n",
+    "* print(type(100))\n",
+    "* print(type(\"Hello\"))"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},
diff --git a/README.md b/README.md
@@ -2,7 +2,7 @@
 
 ## 前言
 
-为了大家有更多的 Python 练习机学，我整理了这本习题集
+为了大家有更多的 Python 练习机会，我整理了这本习题集
 
 ## 变量
 
