fix the CUDA support description in indtall_windows DOC, test=document_preview (#1036)

Done

doc/fluid/beginners_guide/install/install_Windows.md

@@ -2,8 +2,8 @@
 
 ## 环境准备
 
-* *Windows 7/8/10 专业版/企业版 (64bit) (GPU版本支持CUDA 8/9.2, 且仅支持单卡)*
-* *Python 版本 2.7/3.5.1+/3.6/3.7 (64 bit)*
+* *Windows 7/8/10 专业版/企业版 (64bit) (GPU版本支持CUDA 8.0/9.0，且仅支持单卡)*
+* *Python 版本 2.7.15+/3.5.1+/3.6/3.7 (64 bit)*
 * *pip 或 pip3 版本 9.0.1+ (64 bit)*
 
 ### 注意事项
@@ -16,7 +16,7 @@
 * 如果您的计算机没有 NVIDIA® GPU，请安装CPU版的PaddlePaddle
 
 * 如果您的计算机有 NVIDIA® GPU，并且满足以下条件，推荐安装GPU版的PaddlePaddle
-    * *CUDA 工具包8.0/9.2配合cuDNN v7.3+*
+    * *CUDA 工具包8.0/9.0配合cuDNN v7.3+*
     * *GPU运算能力超过1.0的硬件设备*
 
 您可参考NVIDIA官方文档了解CUDA和CUDNN的安装流程和配置方法，请见[CUDA](https://docs.nvidia.com/cuda/cuda-installation-guide-linux/)，[cuDNN](https://docs.nvidia.com/deeplearning/sdk/cudnn-install/)
@@ -41,7 +41,7 @@ Windows系统下有3种安装方式：
 注：
 
 * pip与python版本对应。如果是python2.7, 建议使用`pip`命令; 如果是python3.x, 则建议使用`pip3`命令
-* `pip3 install -U paddlepaddle-gpu` 此命令将安装支持CUDA 9.0 cuDNN v7的PaddlePaddle，目前windows环境下暂不支持其他版本的CUDA和cuDNN。
+* `pip3 install -U paddlepaddle-gpu` 此命令将安装支持CUDA 8.0/9.0 cuDNN v7.3+的PaddlePaddle，目前windows环境下暂不支持其他版本的CUDA和cuDNN。
 
 <a name="check"></a>
 ## 验证安装

doc/fluid/beginners_guide/install/install_Windows_en.md

@@ -2,10 +2,9 @@
 
 ## Operating Environment
 
-* *64-bit operating system*
-* *Windows 7/8, Windows 10 Pro/Enterprise*
-* *Python 2.7/3.5/3.6/3.7*
-* *pip or pip3 >= 9.0.1*
+* *Windows 7/8/10 Pro/Enterprise(64bit)(CUDA 8.0/9.0 are supported, and only single GPU is supported)*
+* *Python 2.7.15+/3.5.1+/3.6/3.7(64bit)*
+* *pip or pip3 9.0.1+(64bit)*
 
 ### Precautions
 
@@ -17,7 +16,7 @@
 * If your computer doesn’t have NVIDIA® GPU, please install the CPU version of PaddlePaddle
 
 * If your computer has NVIDIA® GPU, and it satisfies the following requirements, we recommend you to install the GPU version of PaddlePaddle
-    * *CUDA Toolkit 8.0/9.2 with cuDNN v7.3+*
+    * *CUDA Toolkit 8.0/9.0 with cuDNN v7.3+*
     * *GPU's computing capability exceeds 1.0*
 
 Please refer to the NVIDIA official documents for the installation process and the configuration methods of [CUDA](https://docs.nvidia.com/cuda/cuda-installation-guide-linux/) and [cuDNN](https://docs.nvidia.com/deeplearning/sdk/cudnn-install/).
@@ -42,7 +41,7 @@ There is a checking function below for [verifyig whether the installation is suc
 Notice:
 
 * The version of pip and the version of python should be corresponding: python2.7 corresponds to `pip`; python3.x corresponds to `pip3`.
-* `pip install paddlepaddle-gpu` This command will install PaddlePaddle that supports CUDA 8.0 cuDNN v7. Currently, PaddlePaddle doesn't support any other version of CUDA or cuDNN on Windows.
+* `pip install paddlepaddle-gpu` This command will install PaddlePaddle that supports CUDA 8.0/9.0 cuDNN v7.3+, Currently, PaddlePaddle doesn't support any other version of CUDA or cuDNN on Windows.
 
 <a name="check"></a>
 ## Installation Verification