Fix typo

index.html

@@ -79,7 +79,7 @@
         <div class="header-content-inner">
             <h1>PaddlePaddle</h1>
             <hr>
-	    <p>Open and Easy-to-Use Deep Learning Platform for Enterprise and Research</p>
+	    <p>An open and Easy-to-Use Deep Learning Platform for Enterprise and Research</p>
 	    <a href="http://paddlepaddle.org/doc/demo/quick_start/index_en.html" class="btn btn-primary btn-xl page-scroll">Quick Start</a>
 	    <a href="http://paddlepaddle.org/doc/" class="btn btn-primary btn-xl page-scroll">Documentation</a>
 	    <a href="https://github.com/baidu/paddle" class="btn btn-primary btn-xl page-scroll">Code</a>
@@ -91,7 +91,7 @@
     <div class="container">
         <div class="row">
             <div class="col-lg-8 col-lg-offset-2 text-center">
-                <h2 class="section-heading">What's PaddlePadde</h2>
+                <h2 class="section-heading">What's PaddlePaddle</h2>
                 <hr class="light">
 		<p class="text-faded">PaddlePaddle (PArallel Distributed Deep LEarning) is an easy-to-use, efficient, flexible and scalable deep learning platform, which is originally developed by Baidu scientists and engineers for the purpose of applying deep learning to many products at Baidu.
 		</p>
@@ -256,7 +256,7 @@
             <div class="col-lg-8 col-lg-offset-2 text-center">
                 <h2 class="section-heading">Let's Get In Touch!</h2>
                 <hr class="primary">
-                <p>Is there any problems to use paddle, please contact paddle-dev@baidu.com</p>
+                <p>Is there any problem to use PaddlePaddle, please contact paddle-dev@baidu.com</p>
 	    </div>
 	</div>
     </div>