mod rewrite - remove dynamic part of url .htaccess -

i need remove dynamic part of url:

example.com/pagename/?btag=a_233b_230c_&affid=201

so remove after , including "?"

but don't want rule apply directory:

example.com/wp-content/?attr=1345

is possible .htaccess?

thanks, appreciated jon

rewritecond %{request_uri} !^/wp-content

that might help:-d repeat other folders.

You