新gre逻辑阅读备考资料10套之(九)_GRE阅读

新gre逻辑阅读备考资料10套之(九)

　　7. Excavations at a Mayan site have uncovered jewelry workshops located some distance from the center of the site on roads radiating outward from the center. Since the nobility lived only in the area of the center, archaeologists conclude that these workshops made jewelry, not for the nobility, but for a middle class that must have been prosperous enough to afford it.

　　The archaeologists argument assumes which of the following about the artisans who worked in the workshops

　　 They were themselves prosperous members of a middle class.

　　 They lived near their workshops.

　　 Their products were not made from the same materials as was jewelry for the nobility.

　　 They worked full-time at making jewelry and did not engage in farming

　　 They did not take the jewelry they had made in the workshops to clients who were members of the nobility.

　　8. Over the last 40 years there has been a great increase not only in the number of agricultural pesticides in use but also in the care and sophistication with which they are used by farmers. Nevertheless, the proportion of agricultural crops lost to certain pests worldwide has increased over the same period, even when the pests concerned have not developed resistance to existing pesticides.