请教新g阅读36套中的题目

haoannaUID: 2582245

第26套

Authorities in California required drivers to use their headlights on a certain road during the daytime as well as at night and found that annual accident rates on the road fell 15 percent from the previous level. They concluded that applying the daytime rule statewide would lead to a similar reduction in accidents.

1. Which of the following, if true, most strengthens the authorities' argument?
(A) Because an alternate route became available, the volume of traffic on the test road decreased during the test period.
(B) Drivers were informed of the requirement to use their headlights on the test road by means of a series of three conspicuous signs in each direction of travel.
(C) Under certain conditions, among them fog and heavy rain, most drivers in California already use their headlights during the daytime.
(D) Full-scale application of the daytime rule would cause headlight bulbs to burn out sooner than they currently do and thus to require more frequent replacement.
(E) The test road was selected to include a great variety of the sorts of road conditions that drivers in California are likely to encounter.

答案选A
CD与decrease accident rate 无关肯定排除 接下来就排除不了了


第28套  已有解释。

What causes a helix in nature to appear with either a dextral("right-handed, "or clockwise) twist or a sinistral ("left-handed," or counterclockwise) twist is one of the most intriguing puzzles in the science of form. Most spiral-shaped snail species are predominantly dextral. But at one time, handedness (twist direction of the shell) was equally distributed within some snail species that have become predominantly dextral or, in a few species, predominantly sinistral. What mechanisms, control handedness and keep left-handedness rare?

It would seem unlikely that evolution should discriminate against sinistral snails if sinistral and dextral snails are exact mirror images, for any disadvantage that a sinistral twist in itself could confer on its possessor is almost inconceivable. But left- and right-handed snails are not actually true mirror images of one another. Their shapes are noticeably different. Sinistral rarity might, then, be a consequence of possible disadvantages conferred by these other concomitant structural features. In addition, perhaps left- and right-handed snails cannot mate with each other, having incompatible twist directions. Presumably an individual of the rarer form would have relative difficulty in finding a mate of the same hand, thus keeping the rare form rare or creating geographically separated right- and left-handed populations.


But this evolutionary mechanism combining dissymmetry, anatomy, and chance does not provide an adequate explanation of why right-handedness should have become predominant. It does not explain, for example, why the infrequent unions between snails of opposing hands produce fewer offspring of the rarer than the commoner form in species where each parent contributes equally to handedness. Nor does it explain why, in a species where one parent determines handedness,a brood is not exclusively right- or left-handed when the offspring would have the same genetic predisposition. In the European pond snail Lymnaea peregra, a predominantly dextral species whose handedness is maternally determined, a brood might be expected to be exclusively right- or left-handed—and this often occurs. However, some broods possess a few snails of the opposing hand, and in predominantly sinistral broods, the incidence of dextrality is surprisingly high.

Here, the evolutionary theory must defer to a theory based on an explicit developmental mechanism that can favor either right- or left-handedness. In the case of Lymnaea peregra, studies indicate that a dextral gene is expressed during egg formation; i.e., before egg fertilization, the gene produces a protein, found in the cytoplasm of the egg, that controls the pattern of cell division and thus handedness. In experiments, an injection of cytoplasm from dextral eggs changes the pattern of sinistral eggs, but an injection from sinistral eggs does not influence dextral eggs. One explanation for the differing effects is that all Lymnaea peregra eggs begin left-handed but most switch to being right-handed. Thus, the path to a solution to the puzzle of handedness in all snails appears to be as twisted as the helix itself.


5. In describing the "evolutionary mechanism" (the first sentence of the third paragraph), the author mentions which of the following?
(A) The favorable conditions for nurturing new offspring
(B) The variable environmental conditions that affect survival of adult snails
(C) The availability of potential mates for breeding    据this evolutionary mechanism找回第二段
(D) The structural identity of offspring to parents of the same hand
(E) The frequency of unions between snails of different species


答案选C
A B condition 没有提到 E应为infrequency排除 CD我觉得非常相近 无法排除 主要因为C似乎和原文都不像
D   据a species where one parent determines handedness,a brood is not exclusively right- or left-handed when the offspring would have the same
genetic predisposition.
offspring与parents不一定same排除


第30套 答案校正为D
10. Which of the following, if true, most logically completes the passage?
Every fusion reaction releases neutrinos. To test a hypothesis about the frequency of fusion reactions in the Sun, physicists calculated the number of neutrinos the Sun would produce annually if the hypothesis were correct. From this they estimated how many neutrinos should pass through a particular location on Earth. The fact that far fewer neutrinos were counted than were predicted to pass through the location would seem to prove that the hypothesis is wrong, except that------.


(A) the physicists, using a different method for estimating how many neutrinos should reach the location, confirmed their original estimate
(B) there are several competing hypotheses about the frequency of solar fusion reactions
(C) there is not enough energy in the Sun to destroy a neutrino once it is released
(D) the method used to count neutrinos detects no more than approximately ten percent of the neutrinos that pass through
(E) neutrinos released in the fusion reactions of other stars also reach the Earth



答案选E
我觉得选D才符合啊 需要解释neutrino为什么少于prediction 可是E应该是解释多于prediction吧

coco3263UID: 16360

1.按照逻辑，ACD都反驳了让驾驶员打开头灯这一措施，B加强了这一措施是有效的。只有E说明了为什么这一措施可以被全加州适用，因为加州的路段有多种情况，包括了文中那个地方的路段。

2.应该选D,不过这几个选项的描述都比较笼统，相对而言，只有D里面 各种蜗牛后代的结构分布，好像是第四段的后半部分不停地在例举的：In the European pond snail Lymnaea peregra, a predominantly dextral species whose handedness is maternally determined, a brood might be expected to be exclusively right- or left-handed—and this often occurs. However, some broods possess a few snails of the opposing hand, and in predominantly sinistral broods, the incidence of dextrality is surprisingly high. 就是后代与母系这边的关于手的螺旋方向的结构性。

红线的那句，虽然与E符合，但是只是一句带过，并没有explain。

这是我的理解，可能不对。

haoannaUID: 2582245

2# coco3263 我觉得第一题 首先排除CD CD与减少accident无直接联系 但 ABE我无法排除

coco3263UID: 16360

第一题你复制过来的是全文吗？

coco3263UID: 16360

最后一题我也觉得E会增加neutrinos.

coco3263UID: 16360

1.A 说有另一题路，让司机可以走，所以测试期间那条路上的车祸少了。所以A 是对上段话中的论点进行了weaken.
B说 路上有三个明显标志让司机使用headlight，这只是强化了原来的意思，即headlight是有用的。
E说 整个加州的道路情况复杂，包括了各种情况，文中提到的用headlight的方法来减少事故，可以在全州推广。

A 肯定是不对。还是觉得选E。

haoannaUID: 2582245

6# coco3263 第一题是全文，确实不好选。

我也觉得第三题答案错了。

haoannaUID: 2582245

8# fhb881125 你说的有道理！的确是看第二段。

sheepmiemieUID: 3345086

haoanna 发表于 2011-8-21 12:36
8# fhb881125 你说的有道理！的确是看第二段。

那为什么C可以定位在第三段啊，应该是2段都可以去找吧~~

Yan_cxyUID: 3370177

想问一下，你们做36套时是做电子版的还是打印版的呀？

Yan_cxyUID: 3370177

想问一下，你们做36套时是做电子版的还是打印版的呀？

Yan_cxyUID: 3370177

想问一下，你们做36套时是做电子版的还是打印版的呀？

saber恩叶UID: 3346891

第一题感觉选E吧，A相当于weaken了。。。