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2015年GRE考试阅读理解每日练-1

2015-01-20 19:28:52来源：网络

　　新东方在线为大家精心整理了2015年GRE考试阅读理解每日练的相关内容，分享给大家，供大家参考，希望对大家有所帮助!

　　Questions 1 to 3 are based on the following reading passage.　Immediately relevant to game theory are the sex　ratios in certain parasitic wasp species that have a　large excess of females. In these species, fertilized eggs Line develop into females and unfertilized eggs into males. A female stores sperm and can determine the sex of　each egg she lays by fertilizing it or leaving it unfertilized. By Fisher‘s genetic argument that the sex　ratio will be favored which maximizes the number of　descendants an individual will have and hence the number of gene copies transmitted, it should pay a　female to produce equal numbers of sons and daughters.　Hamilton, noting that the eggs develop within their　host—the larva of another insect—and that the newly　emerged adult wasps mate immediately and disperse,　15 offered a remarkably cogent analysis. Since only one　female usually lays eggs in a given larva, it would pay　her to produce one male only, because this one male　could fertilize all his sisters on emergence. Like Fisher,　Hamilton looked for an evolutionarily stable strategy, but he went a step further in recognizing that he was　looking for a strategy.

　　1. The author suggests that the work of Fisher and Hamilton was similar in that both scientists

　　(A) conducted their research at approximately the same time

　　(B) sought to manipulate the sex ratios of some of the animals they studied

　　(C) sought an explanation of why certain sex ratios exist and remain stable

　　(D) studied game theory, thereby providing important groundwork for the later development of strategy　theory

　　(E) studied reproduction in the same animal species　For the following question, consider each of the　choices separately and select all that apply

　　2. The passage contains information that would answer which of the following questions about wasps?

　　A How many eggs does the female wasp usually lay in a single host larva?

　　B Can some species of wasp determine sex　ratios among their offspring?

　　C What is the approximate sex ratio　among the offspring of parasitic wasps

　　3. Which of the following is NOT true of the species of parasitic wasps discussed in the passage?

　　(A) Adult female wasps are capable of storing sperm.

　　(B) Female wasps lay their eggs in the larvae of　other insects.

　　(C) The adult female wasp can be fertilized by a male that　was hatched in the same larva as herself.

　　(D) So few male wasps are produced that extinction is almost certain.

　　(E) Male wasps do not emerge from their hosts until they　reach sexual maturity.

　　1. 第一题定位到文章最后一句话，结合文章主旨直接得出答案。

　　A. 新内容，same time;

　　B. 新内容，manipulate;(注：sought是seek(寻求)的过去式;)

　　C. 答案;

　　D. 新内容，game theory(实际上该文是由长阅读截取的，未保留的部门是有涉及博弈论的内容的)， later development;

　　E. 虽然貌似一直都在说reproduction，但是文章主旨是强调sex ratios;

　　2. 回答问题多选题：

　　A. 文章没有任何数字;

　　B. 定位第五行：

　　“A female stores sperm and can determine the sex of each egg she lays”

　　C. 文章后半部分并没有涉及到“卵在别人家孩子肚子里的这种情况”的具体性别比例。

　　3. EXCEPT题

　　A. 定位第五行：

　　“A female stores sperm and can determine the sex of each egg she lays”

　　B. 定位在12行：

　　“Hamilton, noting that the eggs develop within their host—the larva of another insect”;

　　C. 定位到17行：

　　“because this one male could fertilize all his sisters on emergence”，也就是说，在同一个幼虫体内长大的兄弟姐妹们是可以互相交配的，事实上只有一个兄弟就够了。

　　D. Female手里有sperm(杀夫取精)，生男生女看心情，只要有她在，就不会灭绝。

　　E. 定位在L13，“the newly emerged adult wasps mate immediately”

　　以上就是新东方在线为大家总结的2015年GRE考试阅读理解每日练的相关内容，希望对大家有所帮助，最后预祝大家在GRE考试中取得优异的成绩!

　　---本文节选自新东方在线论坛


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