一本正经的问两个问题662 664

700即可

662 In the country of Marut,the Foreign Trade Agency's records were reviewed in 1994 in light ofinformation then newly available about neighboring Goro. The review revealedthat in every year since 1963, the agency's projection of what Goro's grossnational product(GNP) would be five years later was a serious underestimate.The review also revealed that in every year since 1963, the agency estimatedGoro's GNP for the previous year--a Goro state secret--very accurately.

Of the following claims, which is most strongly supported by thestatement given?

A Goro's GNP fluctuated greatly between 1963 and 1994.

B Prior to1995, Goro had not released data intended to mislead the agency in making itsfive-year projections.  

C The amountby which the agency underestimated the GNP it projected for Goro tended toincrease over time.  

D Even beforethe new information came to light, the agency had reason to think that at leastsome of the five-year projections it had made were inaccurate.  

E The agency'sfive-year projections of Goro's GNP had no impact on economic planning inMarut.

正确答案选D，完全没思路

  664 In Colorado subalpinemeadows, nonnative dandelions co-occur with a native flower, the larkspur.Bumblebees visit both species, creating the potential for interactions betweenthe two species with respect to pollination. In a recent study, researchersselected 16 plots containing both species; all dandelions were removed fromeight plots; the remaining eight control plots were left undisturbed. Thecontrol plots yielded significantly more larkspur seeds than the dandelion-freeplots, leading the researchers to conclude that the presence of dandelionsfacilitates pollination (and hence seed production) in the native species byattracting more pollinators to the mixed plots.Which of the following, if true, most seriously undermines theresearchers` reasoning?A Bumblebees preferentially visit dandelions over larkspurs in mixedplots.
   B In mixedplots, pollinators can transfer pollen from one species to another to augmentseed production.
   C If left unchecked, nonnative species like dandelions quickly crowdout native species.     D Seed germination is a more reliable measure of a species` fitnessthan seed production.     E Soil disturbances can result in fewer blooms, and hence lower seedproduction.答案E，我选的是B，现在知道E对了，但是还是不知道为什么B是错的我觉得逻辑链：D吸引了更多的pollinators--有D能促进授粉（产生种子）
我觉得B也削弱了逻辑链中的是因为D吸引更多的P...，而是因为有D就可以transfer pollen。也是提出他因吧

spicytaco

662：

in every year since 1963, the agency's projection of what Goro's grossnational product(GNP) would be five years later was a serious underestimate

The review also revealed that in every year since 1963, the agency estimated Goro's GNP for the previous year--a Goro state secret--very accurately.

D Even before the new information came to light, the agency had reason to think that at least some of the five-year projections it had made were inaccurate.

假如1970预测未来5年到1975的数据 上面说严重低估了
然后1972年回国头来估计1971的数据，1973估计1972。。。。1976估计1975...这些数据（后来被证实）是准确的 ，把这些数据和上面在1970的预测的五年数据一对比  哪怕当时不确定哪个是准确的，因为两组数据差别大，有理由质疑不准确
因为每一个五年预测，和连续五年对前一年的估计数据 差别都很大..当然有理由相信至少一部分五年预测是不准确的...

spicytaco

664 这道题目争议特别大
gmatclub上专家和大神们争论不休
关键就是这个by attracting more pollinators to the mixed plots 有了这句话
俺也一直纠结这个B...从上面那句话，我就觉得B在削弱...毕竟给出了另外一个高产的理由

有人解释说B中增加了seed production ，但不能说明是增加了 native species 的seed production，可能是dandelion单方面增加，native species不变或者减少，所以B既不增强，也不削弱。

700即可

spicytaco 发表于 2018-11-18 04:41
662：

in every year since 1963, the agency's projection of what Goro's grossnational product(GNP)  ...

谢谢NN，明白了