fix: replace .chinese.md extension with .md

curriculum/challenges/chinese/01-responsive-web-design/basic-css/size-your-images.md

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+---
+id: bad87fee1348bd9acdf08812
+title: Size Your Images
+challengeType: 0
+videoUrl: 'https://scrimba.com/c/cM9MmCP'
+forumTopicId: 18282
+localeTitle: 调整图片的大小
+---
+
+## Description
+<section id='description'>
+CSS 的<code>width</code>属性可以控制元素的宽度。图片的<code>width</code>宽度类似于字体的<code>px</code>（像素)值。
+假如，你想创建一个叫<code>larger-image</code>的 CSS class 来控制 HTML 元素的宽度为 500px，我们可以这样做：
+
+```html
+<style>
+  .larger-image {
+    width: 500px;
+  }
+</style>
+```
+
+</section>
+
+## Instructions
+<section id='instructions'>
+创建一个<code>smaller-image</code>的 CSS class，设置图片的宽度为 100px。
+<strong>注意：</strong><br>由于不同浏览器的差异性，你可能需要将浏览器缩放到 100% 来通过该挑战。
+</section>
+
+## Tests
+<section id='tests'>
+
+```yml
+tests:
+  - text: '<code>img</code>元素应该含有<code>smaller-image</code> class。'
+    testString: assert($("img[src='https://bit.ly/fcc-relaxing-cat']").attr('class') === "smaller-image");
+  - text: '图片宽度应为 100px（像素），且浏览器缩放应为默认 100%。'
+    testString: assert($("img").width() === 100);
+
+```
+
+</section>
+
+## Challenge Seed
+<section id='challengeSeed'>
+
+<div id='html-seed'>
+
+```html
+<link href="https://fonts.googleapis.com/css?family=Lobster" rel="stylesheet" type="text/css">
+<style>
+  .red-text {
+    color: red;
+  }
+
+  h2 {
+    font-family: Lobster, monospace;
+  }
+
+  p {
+    font-size: 16px;
+    font-family: monospace;
+  }
+</style>
+
+<h2 class="red-text">CatPhotoApp</h2>
+<main>
+  <p class="red-text">点击查看更多<a href="#">猫图</a>.</p>
+  
+  <a href="#"><img src="https://bit.ly/fcc-relaxing-cat" alt="一只仰卧着的萌猫"></a>
+  
+  <div>
+    <p>猫咪最喜欢的三件东西：</p>
+    <ul>
+      <li>猫薄荷</li>
+      <li>激光笔</li>
+      <li>千层饼</li>
+    </ul>
+    <p>猫咪最讨厌的三件东西：</p>
+    <ol>
+      <li>跳蚤</li>
+      <li>打雷</li>
+      <li>同类</li>
+    </ol>
+  </div>
+  
+  <form action="https://freecatphotoapp.com/submit-cat-photo">
+    <label><input type="radio" name="indoor-outdoor">室内</label>
+    <label><input type="radio" name="indoor-outdoor">室外</label><br>
+    <label><input type="checkbox" name="personality">忠诚</label>
+    <label><input type="checkbox" name="personality">懒惰</label>
+    <label><input type="checkbox" name="personality">积极</label><br>
+    <input type="text" placeholder="猫咪图片地址" required>
+    <button type="submit">提交</button>
+  </form>
+</main>
+```
+
+</div>
+
+
+
+</section>
+
+## Solution
+<section id='solution'>
+
+```js
+// solution required
+```
+
+/section>
+