GWD 11-7

misswmp

      According to a theory advanced

       by researcher Paul Martin, the wave

       of species extinctions that occurred

Line       in North America about 11,000 years

  (5)      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

(10)      Shepard Krech points out that large

animal species vanished even in areas

where there is no evidence to demon-

strate that Paleoindians hunted them.

Nor were extinctions confined to large

(15)      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

(20)      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,

(25)      arguing that humans have produced

local extinctions elsewhere.  But,

according to historian Richard White,

even the attribution of secondary

responsibility may not be supported

(30)      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

(35)      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.

Q6:

Which of the following, if true, would most weaken Krech’s objections to Martin’s theory?

Further studies showing that the climatic change that occurred at the end of the Pleistocene era was even more severe and widespread than was previously believed

New discoveries indicating that Paleoindians made use of the small animals, plants, and insects that became extinct

Additional evidence indicating that widespread climatic change occurred not only at the end of the Pleistocene era but also in previous and subsequent eras

Researchers’ discoveries that many more species became extinct in North America at the end of the Pleistocene era than was previously believed

New discoveries establishing that both the arrival of humans in North America and the wave of Pleistocene extinctions took place much earlier than 11,000 years ago

答案是B.

我搞不懂题干的关键: Krech’s objections to Martin’s theory是 K对M的反对(即K的观点),还是 K要反对的M的观点

我感觉是前者,所以选了C. 说明不是气候的原因,削弱 K的观点与气候有关.

请教!谢谢!

misswmp

原来是我没理解好B,惭愧! 削弱K增强M是对的.

make use of----利用! 也不知我怎么脑袋昏了.放在句中理解成了"有用,有利"了,恰恰成了削弱M增强K了.

谢谢sgauly!