[简答题]真理相对性的含义是什么？

In recent years a new farming revolution has begun, one that involves the (1) of life at a fundamental level—the gene. The study of genetics has (2) a new industry called biotechnology. As the name suggest, it (3) biology and modem technology through such techniques as genetic engineering. Some of the new biotech companies specialize in agriculture and are working feverishly to (4) seeds that give a high yield, that (5) diseases, drought and frost, and that reduce the need for (6) chemicals. If such goals could be achieved, it would be most (7) . But some have raised concerns about genetically engineered crops.
In nature, genetic diversity is created within certain (8) . A rose can be crossed with a different kind of rose, but a rose will never cross with a potato. Genetic engineering, (9) usually involves taking genes from one species and inserting them into another (10) to transfer a desired ch
A. beneficial
B. disappointing
C. surprising
D. extreme

　　71．While there are almost as many definitions of history as there are historians, modern practice most closely conforms to one that sees history as the attempt to recreate and explain the significant events of the past. Caught in the web of its own time and place, each generation of historians determines anew what is significant for it in the past. In this search the evidence found is always incomplete and scattered, it is also frequently partial or partisan. The irony of the historian’s craft is that its ractitioners always know that their efforts are but contributions to an unending process. 　　72．Interest in historical methods has arisen less through external challenge to the validity of history as an intellectual discipline and more from internal quarrels among historians themselves. While history once revered its affinity to literature and philosophy, the emerging social sciences seemed to afford greater opportunities for asking new questions and providing rewarding a