According to a theory advanced by researcher Paul Martin，the wave of species extinctions that occurred in North America about 11,000 years ago，at the end of the Pleistocene era，can be directly attributed to the arrival of humans，i.e.，the Paleoindians， who were ancestors of modern Native Americans. However，anthropologist Shepard Krech points out that large animal species vanished even in areas where there is no evidence to demonstrate that Paleoindians hunted them.Nor were extinctions confined to large animals： small animals，plants，and insects disappeared，presumably not all through human consumption. Krech also contradicts Martin's exclusion of climatic change as an explanation by asserting that widespread climatic change did indeed occur at the end of the Pleistocene. Still，Krech attributes secondary if not primary responsibility for the extinctions to the Paleoindians，arguing that humans have produced local extinctions elsewhere.But，according to historian Richard White，even the attribution of secondary responsibility may not be supported by the evidence. White observes that Martin's thesis depends on coinciding dates for the arrival of humans and the decline of large animal species，and Krech，though aware that the dates are controversial，does not challenge them；yet recent archaeological discoveries are providing evidence that the date of human arrival was much earlier than 11,000 years ago. 　3. In the last sentence of the passage， the author refers to “recent archaeological discoveries” (lines 27-30) most probably in order to 　　(A) Refute White's suggestion that neither Martin nor Krech adequately account for Paleoindians' contributions to the Pleistocene extinctions 　　(B) Cast doubt on the possibility that a more definitive theory regarding the causes of the Pleistocene extinctions may be forthcoming 　　(C) Suggest that Martin's， Krech's， and White's theories regarding the Pleistocene extinctions are all open to question 　　(D) Call attention to the most controversial aspect of all the current theories regarding the Pleistocene extinctions 　　(E) Provide support for White's questioning of both Martin's and Krech's positions regarding the role of Paleoindians in the Pleistocene extinctions 老师，我在做这道题的时候，首先定位到最后一句觉得没说什么重点，就有个yet转折，可能这是用来驳斥前面的某些观点的。所以看选项找有没有驳斥的意思的， 发现5个选项全都在驳斥。。。心里慌了往前找。再回去找的时候时间已到。我就随便选了个B（时间一到各种混乱），因为在做这篇文章之前，我大体看了下原文，记住了原文讲的是P反驳M，W反驳P。后来答案我也看明白了，我认为我做这道题的思路出现了偏差，我想问一下应该怎么修正。

请问这道题为什么选E啊，D选项错在哪里

这题答案是选A吗？条件一我带进去算是可以的，具体是怎么推出来的呢？

求唐老师解答一下, 您在明星蛋壳小班-逻辑-第一天-1小时28分左右, 用实验田的镁盐产量阐述"有关"与"无关"逻辑时, 讲到一个选项-"实验田形状"-同产量无关, 但是这里是否也可以理解成, "实验田的形状"同产量有关. 正如之前用到的一个例子-问"吃了什么?"-答""

请徐老师解答，谢谢，这题您看有除了图里那种套公式之外的做法吗，感觉我用插入法捆绑法也做不了，图里那种用公式套的方法感觉太死板没有真正理解题目

请问王文静老师这题的解题思路，谢谢老师

请问王文静老师这题的解题思路，谢谢老师

答案为B，为什么C不可以，but和because可以连用吗

请徐老师详细解答一下，谢谢，看这题是找因数，但是我看7 310 511 716 323这几个数之间也没有共同的因数啊，也没法把X提出来，因为最后30那项也没X，是不是这题出错了。。

这个题为啥不选E, E是平行结构啊，答案是D, D里面出现了but also不对吧？ 因为原题里没not only啊哈哈@唐老师

这道题我选D,答案选B, 答案不对吧，答案最后是these, 但是后面所接的原文是单数的问题private ownership, 所以。答案只能先把B排除了，老师请问这个题应该选什么？