In the command
[Country]
Yes.
The font-family property can hold several font names as a "fallback" system. If the browser does not support the first font, it tries the next font.
From: http://www.w3schools.com/cssref/pr_font_font-family.asp
And as good practice:
Start with the font you want, and always end with a generic family, to let the browser pick a similar font in the generic family, if no other fonts are available.
Yes, the font-family indicates the font priority. If the browser does not support the first font, it tries the next font. If the browser support arial, the style font will be arial. The browser use helvetica if does not support arial. You can use the name of a font-family (times, courier, arial, ...) or the name of a generic-family (serif, sans-serif, cursive, "monospace", ...).