Update install_en.md

docs/en/tutorials/install_en.md

@@ -2,18 +2,18 @@
 
 ---
 
-## Introducation
+## Introduction
 
 This document introduces how to install PaddleClas and its requirements.
 
 ## Install PaddlePaddle
 
-Python 3.6, CUDA 9.0, CUDNN7.6.4 nccl2.1.2 and later version are required at first, For now, PaddleClas only support training on the GPU device. Please follow the instructions in the [Installation](http://www.paddlepaddle.org.cn/install/quick) if the PaddlePaddle on the device is lower than v1.7
+Python 3.x, CUDA 10.0, CUDNN7.6.4 nccl2.1.2 and later version are required at first, For now, PaddleClas only support training on the GPU device. Please follow the instructions in the [Installation](http://www.paddlepaddle.org.cn/install/quick) if the PaddlePaddle on the device is lower than 2.0.0rc1.
 
 Install PaddlePaddle
 
 ```bash
-pip install paddlepaddle-gpu --upgrade
+pip install paddlepaddle-gpu==2.0.0rc1 --upgrade
 ```
 
 or compile from source code, please refer to [Installation](http://www.paddlepaddle.org.cn/install/quick).
@@ -32,7 +32,7 @@ python -c "import paddle; print(paddle.__version__)"
 ```
 
 Note:
-- Make sure the compiled version is later than PaddlePaddle2.0rc.
+- Make sure the compiled version is later than PaddlePaddle2.0rc1.
 - Indicate **WITH_DISTRIBUTE=ON** when compiling, Please refer to [Instruction](https://www.paddlepaddle.org.cn/documentation/docs/zh/develop/install/Tables.html#id3) for more details.
 - When running in docker, in order to ensure that the container has enough shared memory for data read acceleration of Paddle, please set the parameter `--shm_size=8g` at creating a docker container, if conditions permit, you can set it to a larger value.