GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - 75N5SKNTTHHQH064J

The example of a chemical patent is used to illustrate a A. legal mechanism by which community knowledge can be turned into private property B. technological development that goes beyond the scope of nineteenth-century science C. government action that creates a temporary form of intellectual property D. kind of expression that exists only in written, rather than oral, form E. way in which medical innovation can be rewarded