[Orgmode] How can I keep spaces while publishing html?

[Water Lin]

I am using org to publish some context to html now. There are some code
in my file, so I need to keep the code original even don't lose the
spaces.

But even I used @<pre> @</pre> at the begin and end of my code, after I
published the context, the spaces disappeared withou trace!

How can I keep the spaces?

I am using command
C-u M-x org-export-region-as-html
to publish my file.

-- 
Water Lin's blog: http://blog.waterlin.org
Email: address@hidden
__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com