GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - 4C254_51OS3T5R8VJ

The primary purpose of the passage is to A. describe a previously unknown natural phenomenon B. reconstruct the evolution of a natural phenomenon C. establish unequivocally the accuracy of a hypothesis D. survey explanations for a natural phenomenon and determine which is best supported by evidence. E. entertain criticism of the author's research and provide an effective response