一、环境：centOS6.8、Pip、CPU、Python 2.7.5

[root@68-172 baidu]# python
Python 2.7.5 (default, May 15 2019, 09:47:10)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-23)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import paddle.fluid
非法指令

二、环境：centOS7.6、Pip、CPU、Python 3.6.5
[root@localhost ~]# python
Python 3.6.5 (default, May 15 2019, 11:42:48)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-36)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import paddle.fluid
非法指令

请帮忙看看什么原因。