Vegetarianism is booming in Lhasa.Tenzin Drama,Lozang Nyima and Zhang Qjao are typical of vegetarians in Lhasa.Tenzin is a housewife and her family always maintains the principle that some of their income must be used for rescuing animals.One autumn she saw a couple of des- perately frightened pregnant sheep being pushed to- gether into a blood-covered slaughter area.Since then she was determined to be vegetarian.Tenzin has a friend