Going back to the original post, however, two eyes, a mouth and some kind of olfactory organs do seem to be a reasonable configuration for an anterior cluster of organs. They may even be placed on some kind of independently mobile head, as they so often are on our world.
However, considering the wide range of eyes, mouths and olfactory organs which can be found on our planet alone, the chances are that even with such an assemblage an intelligent alien won't look very much like a human.
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