2015 四川省邻水中学高考英语阅读理解一轮练习（四川省邻水中学高考英语阅读理解一轮练习（3）及答案）及答案阅读下列四篇短文，从每小题后所给的 A,B,C 或 D 四个选项中，选出最佳选项。Howling is a behaviour commonly observed among a wolf pack. As pack animals, wolves work together to hunt and rely on howling as an important means of communication among each other. There are different explanations of a wolfs howl and it appears that there may be more to discover. One theory is that wolves howl to bond better together. Its almost as if howling together helps the pack stay together. Perhaps something similar to people feeling a sense of involvement with each other when singing a song together. But this theory may be wrong, explains Fred H. Harrington, a professor who studies wolf behaviour. Indeed, there have been times when wolves have been seen one moment howling in a chorus, and the next, quarreling among each other. It appears that usually the lowest-ranking members of the pack may actually be“punished” for joining in the chorus at times. So is howling a way to strengthen a social bond or just a way to reconfirm status among its members? Why do wolves howl for sure? What is clear, however, is that howling is often used among packmates to locate each other. Hunting grounds are distant and it happens that wolves may separate from one another at times. When this happens, howling appears to be an excellent means of gathering. Howling, interestingly, is a contagious behaviour. When one wolf starts to howl, very likely others will follow. This is often seen to occur in the morning, as if wolves were doing some sort of “roll call” where wolves all howl together to report their presence. 1. What is the possible similarity between wolves howling together and humans singing in chorus? A. The act of calling each other. B. The sense of accomplishment.C. The act of hunting for something. D. The sense of belonging to a group.2. Why does Harrington think the “social bond” theory may be wrong? A. Wolves separate from each other after howling.B. Wolves tend to protect their hunting grounds.C. Wolves sometimes have quarrels after howling together.D. Wolves of low rank are encouraged to join in the chorus.3. Researchers are sure that wolves often howl to . A. show their ranks B. find their companions C. express their loneliness4. “Howling. . . is a contagious behaviour” (in the last paragraph)means . A. howling is a signal for hunting B. howling is a way of communicationC. howling often occurs in the morning D. howling spreads from one to another【参考答案】1-4 DCBD Passage Thirty-five (Exploration on the Origin of Continents)The origin of continental nuclei has long been a puzzle. Theories advanced so far have generally failed to explain the first step in continent growth, or have been subject to serious objections. It is the purpose of this article to examine the possible role of the impact of large meteorites or asteroids in the production of continental nuclei. Unfortunately, the geological evolution of the Earths surface has had an obliterating effect on the original composition and structure of the continents to such an extent that further terrestrial investigations have small chance of arriving at an unambiguous answer to the question of continental origin. Paradoxically, clues to the origin and early history of the surface features of the Earth may be found on the Moon and planets, rather than on the Earth, because some of these bodies appear to have had a much less active geological history. As a result, relatively primitive surface features are preserved for study and analysis. In the case of both the Moon and Mars, it is generally concluded from the appearance of their heavily cratered surfaces that they have been subjected to bombardment by large meteoroids during their geological history. Likewise, it would appear a reasonable hypothesis that the Earth has also been subjected to meteoroid bombardment in the past, and that very large bodies struck the Earth early in its geological history.The large crater on the Moon listed by Baldwin has a diameter of 285 km. However, if we accept the hypotheses of formation of some of the mare basins by impact, the maximum lunar impact crater diameter is probably as large as 650km. Based on a lunar analogy, one might expect several impact craters of at least 500km diameter to have been formed on Earth. By applying Baldwins equation, the depth of such a crater should be about 20km. Baldwin admits that his equation gives excessive depths for large craters so that the actual depth should be somewhat smaller. Based on the measured depth of smaller lunar crater. Baldwins equation gives the depth of the zone of brecciation for such a crater as about 75km. The plasticity of the Earths mantle at the depth makes it impossible to speak of “bracciation” in the usual sense. However, local stresses may be temporarily sustained at that depth, as shown by the existence of deep-focus earthquakes. Thus, short-term effects might be expected to a depth o