[求助]TEST 大全-19-15

bensealet

15.   Over the last century, paleontologists have used small differences between fossil specimens to classify triceratops into sixteen species. This classification is unjustified, however, since the specimens used to distinguish eleven of the species come from animals that lived in the same area at the same time.

Which of the following, if true, would enable the conclusion of the argument to be properly drawn?


(A) Not every species that lived in a given area is preserved as a fossil.


(B) At least one individual of every true species of triceratops has been discovered as a fossil specimen.


(C) No geographical area ever supports more than three similar species at the same time.


(D) In many species, individuals display quite marked variation.（C）



(E) Differences between fossil specimens of triceratops that came from the same area are no less distinctive than differences between specimens that came from different areas.

请问为什么选C?不明白

Lhitachii

原来一直看不懂这题，现在是看明白了，但是答案不对啊，lawyer说的一点没错，如果C正确，那么原来的11分类就是错误的，那不是正好和原文反了吗？原文说，16分类是不对的，因为曾经有过一个11分类。所以应该是D啊 很对同种生物之间都有不小的差别，那现在凭借small differences分了16个是不对的，这不就是原文结论嘛

cookiezwy

应该是错在in many species

stellalights

请问D为什么不对？个体变异，即还为同一类种类，变异的应该还算同一类而非另分一类

imddung

如果C是对的，则原文用同一地区的11个样本去分类就不对。即结论。

对于这类题：下列哪个选项使原文结论合理推出。检验的公式为：选项+原文前提——〉一定能推出原文的结论