别指望在加拿大办美签了,人家网站上写的很清楚: ' {+ C1 x& a: Y. S1 c! V& z" x http://www.consular.canada.usembassy.gov/usa_visa.asp 里的: $ a* H4 L6 B* c& e3 Q" D' i & O; Y7 C' a, U' D8 o"Important Notice for Applicants with a Visitor's Permit to Canada / B) _' K: S7 C$ s& n" z! {# T. R4 r 5 w" o; ]- r. j/ ~With rare exceptions, visa applicants temporarily visiting Canada should apply at the U.S. Consular Section in their country of residence."