aded case sensitive

Author: khan4019

css.html

@@ -148,17 +148,14 @@ <h2>3. preprocessor</h2>
 </div>
 
 
-<!-- <div id="bdo">
-  <h2>4. bdo</h2>
-  <p><strong>Question:</strong> How can u change direction of html text?</p>
-  <p><strong>Answer:</strong> use bdo (bidirectional ovverride) element of html.</p>
+<div id="bdo">
+  <h2>4. case sensitive</h2>
+  <p><strong>Question:</strong> Does css properties are case sensitive?</p>
+  <p><strong>Answer:</strong> no.</p>
   <pre><code>
-&lt;!-- Switch text direction --&gt;<br/>&lt;p&gt;&lt;bdo dir=&quot;rtl&quot;&gt;This text will go right to left.&lt;/bdo&gt;&lt;/p&gt;
+//add an example here
   </code></pre>
-  <strong>result:</strong>  
-<p><bdo dir="rtl">This text will go right to left.</bdo></p>
-<p><strong>extra:</strong> rtl: right to left. and alternatively you can use, ltr: left to right.</p>
-</div> -->
+</div>
 <!-- <div id="mark">
   <h2>5. mark</h2>
   <p><strong>Question:</strong> How can u highlight text in html?</p>
@@ -290,6 +287,7 @@ <h2>References</h2>
     <li><a href=""></a></li>
     <li><a href=""></a></li>
   </ul>
+
 </div>
 
 <!-- div>h2+p+pre>code -->