[求助]prep1-13, prep1-20求助 - ChaseDream

United States

manufacturers currently produce most of the world's solar-power generators--most of which are exported to Europe. However, European manufacturers are emerging and probably will ultimately capture much of the European market. The United States government is funding initiatives intended to encourage use of solar power within the United States. If these initiatives succeed in increasing the demand for solar-power generators in the United States, United States manufacturers will probably maintain significant production levels, since __________.

(A) some United States manufacturers have been substantially increasing their output over the last several years

(B) the efficiency of solar-power generators in converting energy from the Sun into electric power is not improving as fast as it once did

(C) just as European manufacturers enjoy certain competitive advantages in Europe, so do United States manufacturers in the United States

(D) European governments are currently undertaking initiatives to stimulate the use of solar power within Europe

(E) the current market for solar-power generators in the United States is very limited

For years the beautiful Renaissance buildings in Palitito have been damaged by exhaust from the many tour buses that come to the city. There has been little parking space, so most buses have idled at the curb during each stop on their tour, and idling produces as much exhaust as driving. The city has now provided parking that accommodates a third of the tour buses, so damage to Palitito's buildings from the buses' exhaust will diminish significantly.

(A) The exhaust from Palitito's few automobiles is not a significant threat to Palitito's buildings.

(B) Palitito's Renaissance buildings are not threatened by pollution other than engine exhaust.

(C) Tour buses typically spend less than one-quarter of the time they are in Palitito transporting passengers from one site to another.

(D) More tourists come to Palitito by tour bus than by any other single means of transportation.

(E) Some of the tour buses that are unable to find parking drive around Palitito while their passengers are visiting a site.

13题是不是这个意思，如果鼓励solar generator，就会导致美国保持signigicant production level而不是欧洲，所缺少的条件是美国生产商有competitive advantage，如果没有这个条件，美国productin level可能会不变因为欧洲的优势会打败美国生产商，所以c是一个假设前提。

现在美国的solar-power generators市场有限，在成功的刺激了美国本土市场后，生产产商才有可能继续保持它们的生产产能：即把丢掉欧洲市场后富裕的生产产能，用于供给美国本土的需求。

以下是引用rnir在2008-7-29 6:52:00的发言：
跟2楼说的一样，这题的推理就是欧洲公司在欧洲可以成功，所以美国公司在美国也可以成功，C的competitive advantage可以解释为本土公司的产品在本土具有竞争优势。E说美国现在市场有限，但是增长不一定能补回欧洲的损失，而且如果欧洲公司才具有competitive advantage的话美国人也可以买欧洲公司的产品，这样仍然得不偿失

以下是引用neo1001在2008-1-17 23:09:00的发言：
第一题，只有C成立，前面所说的if these initiatives succeed....maintain significant production levels 才会成立，因为如果美国公司在美国没有competitive advantages的话，就算solar power generators在美国的需求很大，美国公司没准也会被欧洲公司打败

第二题，C，原文说，旅游汽车的废气对文艺复兴的建筑物损害很大，那是因为没有足够的parking，那些旅游汽车只能idle等他们的游客，而idle的时候发出的废气与平时一样多。然后他们决定提供parking，所以以后废气所产生的damage会大幅减少

A, 无关，原文就说废气是一个threat，而且最后说damage from the exhaust会大幅减少，与non-exhaust的因素无关
B,与A相似，无关的信息，（子集与全集的概念，原文一直在讨论exhaust产生的影响，A，B却跳出来讨论exhaust以外的因素）
C，正确。1/4的时间在transport，就是说3/4的时间在idle，也就是说，建了parking以后，这原本要排放废气的3/4时间现在都可以不排放废气了，对原文加强
D，无关
E，就算不idle，而是drive around，产生的废气是一样多的，没有影响