Does Google consider my blog page as duplicate page if that page URL and that page URL with ‘showcomment’ cached separately?

Posted by John Sanjay on Pro Webmasters See other posts from Pro Webmasters or by John Sanjay
Published on 2013-06-26T18:31:04Z Indexed on 2013/06/26 22:30 UTC
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While I’m searching all the index page of my blog I found that Google cached one of my blog page http://example.com/page.html

as well as

http://example.com/page.html?showComment=1372054729698

These two pages are showing while I searched site:http://example.com. I’m so afraid about it because these two pages are same with same content. Does google consider these two pages as duplicate? If so what can I do now? Is it really a big problem to my blog?

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