麻烦牛人们解答一下吧

欧洋彤

Frobisher, a sixteenth-century English explorer, had soil samples from Canada’s Kodlunarn Island examined for gold content. Because high gold content was reported, Elizabeth I funded two mining expeditions. Neither expedition found any gold there. Modern analysis of the island’s soil indicates a very low gold content. Thus the methods used to determine the gold content of Frobisher’s samples must have been inaccurate.

Mining=采矿，采矿业

Which of the following is an assumption on which the argument depends?

1. The gold content of the soil on Kodlunarn Island is much lower today than it was in the sixteenth century.
   
   
2. The two mining expeditions funded by Elizabeth I did not mine the same part of Kodlunarn Island.
   
   
3. The methods used to assess gold content of the soil samples provided by Frobisher were different from those generally used in the sixteenth century.
   
   
4. Frobisher did not have soil samples from any other Canadian island examined for gold content.
   
   
5. Gold was not added to the soil samples collected by Frobisher before the samples were examined.
   
   这和他掺不掺假有什么关系啊？
   
   

serene301

denial test：如果在F检测之前，sample里面是加了金子的，而又被F检测到，就证明F检测出gold的方法是正确的，也就是他的methods是accurate，与原文“methods ……inaccurate”相反，注意methods的定语，他的方法只是用来检测gold content的