IN Sheremetevo-2, once past the uniform, very seventies beige of customs and immigration, there seems to be advertising on virtually every surface. There are at least four advertisements on the luggage cart she's using, one Hertz and three others in Russian. As in Japan, she's realized, she's partially buffered by her inability to read the language. For which she's grateful, as the density of commercial language here, in this airport at least, rivals Tokyo.