diff --git a/Untitled.ipynb b/Untitled.ipynb
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+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "20 12 17 21 "
+     ]
+    }
+   ],
+   "source": [
+    "# 题目一\n",
+    "# 有一个这样的DNA核酸序列“AGCTTTTCATTCTGACTGCAACGGGCAATATGTCTCTGTGTGGATTAAAAAAAGAGTGTCTGATAGCAGC”.请把这个核酸序列存入一个list，并数一数A、G、C、T各有多少个。\n",
+    "\n",
+    "str_dna='AGCTTTTCATTCTGACTGCAACGGGCAATATGTCTCTGTGTGGATTAAAAAAAGAGTGTCTGATAGCAGC'\n",
+    "list_dna=['A','C','G','T']\n",
+    "for i in range(len(list_dna)):\n",
+    "    print(str_dna.count(list_dna[i]),'',end='') "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "\n",
+      "一个运动员可能得0.25分\n",
+      "\n",
+      "一个运动员可能得0.5分\n",
+      "\n",
+      "一个运动员可能得0.75分\n",
+      "\n",
+      "一个运动员可能得1分\n",
+      "\n",
+      "一个运动员可能得1.25分\n",
+      "\n",
+      "一个运动员可能得1.5分\n",
+      "\n",
+      "一个运动员可能得1.75分\n",
+      "\n",
+      "一个运动员可能得2分\n",
+      "\n",
+      "一个运动员可能得2.25分\n",
+      "\n",
+      "一个运动员可能得2.5分\n",
+      "\n",
+      "一个运动员可能得2.75分\n",
+      "\n",
+      "一个运动员可能得3分\n",
+      "\n",
+      "一个运动员可能得3.25分\n",
+      "\n",
+      "一个运动员可能得3.5分\n",
+      "\n",
+      "一个运动员可能得3.75分\n",
+      "\n",
+      "一个运动员可能得4分\n",
+      "\n",
+      "一个运动员可能得4.25分\n",
+      "\n",
+      "一个运动员可能得4.5分\n",
+      "\n",
+      "一个运动员可能得4.75分\n",
+      "\n",
+      "一个运动员可能得5分\n",
+      "\n",
+      "一个运动员可能得5.25分\n",
+      "\n",
+      "一个运动员可能得5.5分\n",
+      "\n",
+      "一个运动员可能得5.75分\n",
+      "\n",
+      "一个运动员可能得6分\n",
+      "\n",
+      "一个运动员可能得6.25分\n",
+      "\n",
+      "一个运动员可能得6.5分\n",
+      "\n",
+      "一个运动员可能得6.75分\n",
+      "\n",
+      "一个运动员可能得7分\n",
+      "\n",
+      "一个运动员可能得7.25分\n",
+      "\n",
+      "一个运动员可能得7.5分\n",
+      "\n",
+      "一个运动员可能得7.75分\n",
+      "\n",
+      "一个运动员可能得8分\n",
+      "\n",
+      "一个运动员可能得8.25分\n",
+      "\n",
+      "一个运动员可能得8.5分\n",
+      "\n",
+      "一个运动员可能得8.75分\n",
+      "\n",
+      "一个运动员可能得9分\n",
+      "\n",
+      "一个运动员可能得9.25分\n",
+      "\n",
+      "一个运动员可能得9.5分\n",
+      "\n",
+      "一个运动员可能得9.75分\n",
+      "\n",
+      "一个运动员可能得10分\n"
+     ]
+    }
+   ],
+   "source": [
+    "# 题目二\n",
+    "# 一个花样滑冰运动员表演后，裁判给表演内容进行评分，分数从0.25分到10分，每次增加值为0.25分。\n",
+    "\n",
+    "# 试生成一个元组，把可能的得分存入元组，并遍历元组的每一项，打印“一个运动员可能得_____分”。\n",
+    "\n",
+    "tuple_goal=(0.25,0.5,0.75,1,1.25,1.5,1.75,2,2.25,2.5,2.75,3,3.25,3.5,3.75,4,4.25,4.5,4.75,5,5.25,5.5,5.75,6,6.25,6.5,6.75,7,7.25,7.5,7.75,8,8.25,8.5,8.75,9,9.25,9.5,9.75,10)\n",
+    "for goal in tuple_goal:\n",
+    "    print(\"\\n一个运动员可能得\"+str(goal)+\"分\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "肠粉是广州的一种美食，他的主要原料是米\n",
+      "烤冷面是哈尔滨的一种美食，他的主要原料是米\n",
+      "辣条是郑州的一种美食，他的主要原料是大豆\n"
+     ]
+    }
+   ],
+   "source": [
+    "# 题目三：\n",
+    "# 创建一个字典，列出你所了解的地域美食，比如{'肠粉':{'城市':'广州','原料':'米'}}。当然，你可以做的更丰富一些。 最后遍历你熟悉的美食，打印出，类似如下的句子：“肠粉是广州的一种美食，它的主要原料是米”。\n",
+    "foods = {'肠粉': {'城市': '广州', '原料': '米'},'烤冷面': {'城市': '哈尔滨', '原料': '米'},'辣条': {'城市': '郑州', '原料': '大豆'}}\n",
+    "for foods_name, foods_information in foods.items():\n",
+    "    print(foods_name.title()+\"是\"+foods_information['城市']+\"的一种美食，他的主要原料是\"+foods_information['原料'])\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.6.5"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}