why my site is showing wp-content?

hi guys,
I use wordpress for my site but I don’t know why it doesn’t show the real pages.
once today my site database was closed suddenly and now I’ve re-opened it again. the pages in wp-admin part has content but shows a 404 error when you try to open the pages. like this.
and for the home page it shows a wp-content page which you can see there in my web.

please help me as soon as possible. thanks a lot

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