求助LSAT-4-3-6,LSAT-4-3-25

sophie_zyy

6. As air-breathing mammals. Whales must once have lived on land and needed hind limbs capable of supporting the mammals' weight. Whales have the bare remnants of a pelvis. If animals have a pelvis, we expect them to have hind limbs. A newly discovered fossilized whale skeleton has very fragile hind limbs that could not have supported the animal's weight on land. This skeleton had a partial pelvis.

If the statement above are true, which one of the following, if also true, would most strongly support the conclusion that the fragile hind limbs are remnants of limbs that land-dwelling whales once had?

(A) Whale bones older than the fossilized hind limbs confirm that ancient whales had full pelvises.

(B) No skeletons of ancient whales with intact hind limbs capable of supporting the mammals' weight have ever been found.

(C) Scientists are uncertain whether the apparently nonfunctioning limbs of other early mammals derived from once-functioning limbs of their ancestors.

(D) Other large-bodied mammals like seals and sea lions maneuver on beaches and rocky coasts without fully functioning hind limbs.

(E) Some smaller sea-dwelling mammals. Such as modern dolphins. Have no visible indications of hind limbs

为什么答案是A?????

25. Situation: In the island nation of Bezun ,the government taxes gasoline heavily in order to induce people not to drive . It uses the revenue from the gasoline tax to subsidize electricity in order to reduce prices charged for electricity.

Analysis: The greater the success achieved in meeting the first of these objectives, the less will be the success achieved in meeting the second .

The analysis provided for the situation above would be most appropriate in which one of the following situations?

(A) A library charges a late fee in order to induce borrowers to return books promptly. The library uses revenue from the late fee to send reminders to tardy borrowers on order to reduce the incidence of overdue books .

(B) A mail-order store imposes a stiff surcharge for overnight delivery in order to limit use of this option. The store uses revenue from the surcharge to pay the extra expenses it incurs for providing the overnight delivery service.

(C) The park management charges an admission fee so that a park's users will contribute to the park's upkeep. In order to keep admission fees low ,the management does mot finance any new projects from them.

(D) A restaurant adds a service charge in order to spare customers the trouble of individual tips. The service charge is then shared among the restaurant's workers in order to augment their low hourly wages.

(E) The highway administration charges a toll for crossing a bridge in order to get motorists to use other routes .It uses the revenue from that toll to generate a reserve fund in order to be able one day to build a new bridge.

这道题我没看懂,望大虾指点!

lawyer_1

6。原文说发现的WHALE的骨架化石后肢较弱，这种骨架的PELVIS不全。原文又说有PELVIS，就有后肢。A说这种骨架的更早的WHALE的PELVIS比较全，这样它的后肢应该更强，支撑身体的可能性增大。即结论的可能性增大：conclusion that the fragile hind limbs are remnants of limbs that land-dwelling whales once had。所以SUPPORT

25。找一个选项，符合ANALYSIS所说的原则：第一个目标或目的越成功，第二个目标或目的越不易成功。只有E符合这个特点。别管原文的SITUATION，它其实也是该原则的一个例子。

zenger

25题还是要考虑原文意思。

否则D）也符合analysis的说法。

结合了原文，知道第一个目标的成功，是通过减弱第二个的资源而导致第二个不易成功的。

而D）的第二个的不成功是由于方法问题造成的。

xjlv128

不是吧，楼上。D中1成功则2可以达到啊

还是lawyer对啊

zxzhyzcy

我自己的错误是，没有弄清楚要support的结论是the fragile hind limbs are remnants of limbs that land-dwelling whales once had.

只是说一下自己的理解，请NN们指点~

结论说新发现的hind limbs are remnants of limbs that land-dwelling whales once had.那意味着答案至少要证明whales以前是land-dwelling whales ，它们有hind limbs capable of wuppoting the mammal's weight，而hind limbs的一个表现就是pelvis.

答案A说不仅有pelvis，而且有full pelvis，正是证明了whales have capable hind limbs,那么新发现的hind limbs也就有可能是remnants了~

自己感觉还是有点牵强的说~~~不过感觉B是在weaken，C、D、E都是无关的选项~