求教 PREP上的两道逻辑题 24179-!-item-!-188;#058&000705 &(28411-!-item-!-188;#058&003617)

sunqimin

1.    (24179-!-item-!-188;#058&000705)

 

Although fullerenes--spherical molecules made entirely of carbon--were first found in the laboratory, they have since been found in nature, formed in fissures of the rare mineral shungite.  Since laboratory synthesis of fullerenes requires distinctive conditions of temperature and pressure, this discovery should give geologists a test case for evaluating hypotheses about the state of the Earth's crust at the time these naturally occurring fullerenes were formed.

 

Which of the following, if true, most seriously undermines the argument?

 

(A) Confirming that the shungite genuinely contained fullerenes took careful experimentation.

(B) Some fullerenes have also been found on the remains of a small meteorite that collided with a spacecraft.

(C) The mineral shungite itself contains large amounts of carbon, from which the fullerenes apparently formed.

(D) The naturally occurring fullerenes are arranged in a previously unknown crystalline structure.

(E) Shungite itself is formed only under distinctive conditions.

选D

A C E是很明显的无关, 怎么考虑选项B 和D

B说的是F可能是从外太空来的,所以我认为是不能表明地壳的情况的.所以选了B

D怎么考虑呀

20.   (28411-!-item-!-188;#058&003617)

 

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.

 

Which of the following, if true, most strongly supports the argument?

 

(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.

选C

A B D很明显不对, C和E之间怎么考虑呀

望NN们指点一下~~~~

dio123456

第二个把  文中说的是significantly


e是 some 不够明显阿

crazecat123

第一题，我认为这段话是基本上说，由于测试案例在实验室中，我们可以了解更多有关地壳那里fullerenes的形成。基本假设是，合成与自然发生的fullerenes，是在结构和性质上相似。所以，要削弱得出这样的结论，我们必须指出，合成和天然fullerenes不是同一回事。 B不削弱论据（如果不说，不要想当然地），B是（它说有以前未知的） 。

芍芍曼

说别的东西上也有fullerenes和文章推理无关，属于无关新变量(其实B选项改一下就可以是正确答案：fullerenes can also be found on the remains of meteorites,在外星形成，跟地球无关)
只是说相撞，没说掉到地球上的陨石，更不清楚这个meteorite是不是地球飞出来的