求助GRE阅读36套exercise 25.26中的问题~~

PhoenixZhou13UID: 3542158

It has long been known that during an El Nino, two conditions exist: (1) unusually warm water extends along the eastern Pacific, principally along the coasts of Ecuador and Peru, and (2) winds blow from the west into the warmer air rising over the warm water in the east. These winds tend to create a feedback mechanism by driving the warmer surface water into a "pile" that blocks the normal upwelling of deeper, cold water in the east and further warms the eastern water, thus strengthening the wind still more. The contribution of the recent model is to show that the winds of an El Nino, which raise sea level in the east, simultaneously send a signal to the west lowering sea level. According to the model, that signal is generated as a negative Rossby wave, a wave of depressed, or negative, sea level, that moves westward parallel to the equator at 25 to 85 kilometers per day.

3. It can be inferred from the passage that which of
the following would result fairly immediately from
the cessation of the winds of an El Nino?
A Negative Rossby waves would cease to be
generated in the eastern Pacific.
B The sea level in the eastern Pacific would fall.
C The surface water in the eastern Pacific would
again be cooled by being mixed with deep water.

A选项文中没有提到 Rossby waves是在东太平洋产生的呀。

Since 1953, many experimental attempts to synthesize the chemical constituents of life under "primitive Earth conditions" have demonstrated that a variety of the complex molecules currently making up living organisms could have been present in the early ocean and atmosphere, with only one limitation: such molecules are synthesized far less readily when oxygen-containing compounds dominate the atmosphere. Therefore some scientists postulate that the Earth's earliest atmosphere, unlike that of today, was dominated by hydrogen, methane, and ammonia. From these studies, scientists have concluded that the surface of the primitive Earth was covered with oceans containing the molecules fundamental to life. Although, at present, scientists cannot explain how these relatively small molecules combined to produce larger, more complex molecules, some scientists have precipitously ventured hypotheses that attempt to explain the development, from larger molecules, of the earliest self-duplicating organisms.

1. According to the passage, which of the following
can be inferred about the process by which the
chemical constituents of life were synthesized under
primitive Earth conditions?
(A) The synthesis is unlikely to occur under current
atmospheric conditions
(B) The synthesis is common in modern laboratories.
(C)The synthesis occurs more readily in the
atmosphere than in the ocean.
(D)The synthesis easily produces the most complex
organic molecules.
(E)The synthesis is accelerated by the presence of
oxygen-containing compounds.

这道题选C请问是怎么推出来的啊

Scholars often fail to see that music played an important role in the preservation of African culture in the United States. They correctly note that slavery stripped some cultural elements from Black people-their political and economic systems-but they underestimate the significance of music in sustaining other African cultural values. African music, unlike the music of some other cultures, was based on a total vision of life in which music was not an isolated social domain. In African culture music was pervasive, serving not only religion, but all phases of life, including birth, death, work, and play. Music, like art in general, was so inextricably a part of African culture that it became a crucial means of preserving the culture during and after the dislocations of slavery.

10. In the argument given , the two highlighted portions
play which of the following roles? （第一句和最后一句）
○A The first sentence introduces the topic of the
passage and the last one summarizes the passage.
○B The first sentence presents a thesis and the last one
further develops the thesis.
○C The first sentence summarizes the main idea of the
passage and the last one paraphrases it literally.
○D The first sentence presents a context for the
discussion of the passage and the last one
summarizes the discussion.
○E The first sentence presents the negative thesis of the
passage and the last one presents the positive thesis.

这题选E， 完全不能理解啊。感觉A和D都比它对啊

谢谢大家~~~

小硕鼠UID: 3411565

帖子题目中请标明出处

Justin@purdueUID: 3542023

友情提示下第二题应该选a，其他仔细看看都应该看得出来