Define these terms in detail (a paragraph at least ). when appropriate give an example of each:
1. indexical sign:
2. ambrotype:
3. previsualization:
4. stereograph/stereoscope:

Answer (true);

Answer the above statement is (false) the correct answer is linear villages;

The us is first  the  u.s. economy  remains the  largest in the world  in terms of nominal  gdp. however, the  u.s. economy  loses its spot as the number one  economy  to china when  measured  in terms of  gdp  based on ppp. in these terms, china's  gdp  is $23.19 trillion exceeds the  u.s. gdp  of $19.42 trillion