求助！这道题的B为什么不对

鱼仔1106

A table made entirely from the trunk of a tree said to have lived a thousand years was recently claimed to be that of a much younger tree. In order to rebut this charge, the craftsman summoned a team of dendrochronologists to prove that the tree lived to be at least to 1,000 years old. Dendrochronology, or the technique of using tree rings to date wood, is based on the fact that for each passing year a tree develops exactly one ring, as seen in a horizontal cross-section of the trunk. Given that dendrochronology is accurate for trees that lived less than 2,000 total years, the dendrochronologists will be able to determine whether the work comes from a tree that lived to be at least 1,000 years old.

Which of the following is an assumption that the argument makes?

• AThe artist has not used the trunk of the same tree in other works of art he has produced. 分析该选项
• BThe tree was not less than 1,000 years old when it was cut down. 分析该选项
• CThe artist worked on the wood consistently, without taking breaks of more than one year. 分析该选项
• DThe wood used in the table is large enough to contain a span of one thousand tree rings. 分析该选项
• EDendrochronology has shown to be inaccurate for the oldest trees in the world, since parts of the trunks are so worn down that traces of tree rings are difficult to discern.
  

westminster

D 是对的吧？
P：dendrochronologists is accurate for trees that lived less than 2,000 total years.
C: dendrochronologists will be able to determine whether the work comes from a tree that lived to be at least 1,000 years old.

B无关。文章的关键是要看是否可以、或者如何判断这个树的年龄。而且，取非B（树至少1000年）也不能削弱或加强原推论。

鱼仔1106

westminster 发表于 2018-9-3 22:16
D 是对的吧？
P：dendrochronologists is accurate for trees that lived less than 2,000 total years.
C ...

OK 明白啦 谢谢！