[单项选择] Secrets of the Forest In 1942 Allan R Holmberg, a doctoral student in anthropology from Yale University, USA, ventured deep into the jungle of Bolivian Amazonia and searched out an isolated band of Siriono Indians. The Siriono, Holmberg later wrote, led a "strikingly backward" existence. Their villages were little more than clusters of thatched huts. Life itself was a continuing and punishing search for food: some families grew manioc and other starchy crops in small garden plots cleared from the forest, while other members of the tribe scoured the country for small game and promising fish holes. When local resources became depleted, the tribe moved on. As for technology, Holmberg Noted, the Siriono "may be classified among the most handicapped peoples of the world". Other than bows arrows and crude digging sticks, they only tools the Siriono seemed to possess were "two machetes (大砍刀) worn to the size of pocket-knives". Amazonian as unable to
A. Y
B. N
C. NG