课程咨询

GRE首页 GRE课程 GRE动态 0元讲座 GRE模考网站

新东方在线 > GRE > GRE阅读 > 正文
扫码关注掌握一手留学资讯

扫码关注掌握一手留学资讯

回复XDF免费领

水平测试和备考资料

扫码关注公众号

GRE阅读题目解析：美洲龙虾

2017-01-12 15:40:00来源：网络

　　P4

　　1

　　The two claws of the mature American lobster are decidedly different from each other.

　　成年美洲龙虾的两只螯差别非常显著。

　　2

　　The crusher claw is short and stout; the cutter claw is long and slender.

　　crusher 螯短而壮;cutter 螯细长。

　　3

　　This bilateral asymmetry begins to appear in the juvenile sixth stage of development.

　　这种两侧不对称的体征在龙虾发育的幼年第六期开始出现。

　　4

　　One possible explanation is that differential use of the claws determines their asymmetry; the claw that is used more becomes the crusher.

　　一种可能的解释是，不同用途决定了螯的不对称;更常用的螯变成了 crusher 。

　　5

　　To test this hypothesis, researchers raised lobsters in the juvenile fourth and fifth stages of development in a laboratory environment in which the lobsters could manipulate oyster chips.

　　为了测试这种假设，研究者们在实验环境下，养了一些发育处于幼年第四期和第五期的龙虾，并让它们抓取 oyster 片。

　　6

　　Under these conditions, the lobsters developed asymmetric claws, half with crusher claws on the left, and half with crusher claws on the right.

　　在这种条件下，龙虾都发育出了不对称的螯，一半左边发育成 crusher，另一半右边。

　　7

　　In contrast, when juvenile lobsters were reared in a smooth tank without the oyster chips, the majority developed two cutter claws.

　　对比来看，被养在平滑水箱里的没有 oyster chips 可抓的幼年龙虾，多数发育出了两个 cutter 螯。

　　8

　　This unusual configuration of symmetrical cutter claws did not change when the lobsters were subsequently placed in a manipulatable environment or when they lost and regenerated one or both claws. (165 words)

　　这种不常见的对称 cutter 螯的生理结构，即便过后被放在可供抓取的环境中也不会再发生改变，亦或即便它们失去了一只或两只螯，又再生出新的(也不会改变)。

　　7.The passage is primarily concerned with

　　(A) drawing an analogy between asymmetry in lobsters and handedness in humans

　　(B) developing a method for predicting whether crusher claws in lobsters will appear on the left or right side

　　(C) explaining differences between lobsters' crusher claws and cutter claws

　　(D) discussing a possible explanation for the way bilateral asymmetry is determined in lobsters

　　(E) summarizing the stages of development of the lobster

　　选 D

　　A 错在这里没有人类的事。

　　B 错，没有 predicting，只是说了一句观察结果是左右各一半。

　　C 没有更多地解释他们的不同，我们只知道它们外形不同，但这不叫文章的主要内容。

　　D 正确。这种可能的解释是，用途不同，外形不同。

　　E 没有 summarizing 什么 stages，我们读完都不知道每个 stage 是根据什么标准划分的。

　　8.It can be inferred that of the two laboratory environments mentioned in the passage, the one with oyster chips was designed to

　　(A) prove that the presence of oyster chips was not necessary for the development of a crusher claw.

　　(B) prove that the relative length of time that the lobsters were exposed to the oyster-chip environment had little impact on the development of a crusher claw

　　(C) eliminate the environment as a possible influence in the development of a crusher claw

　　(D) control on which side the crusher claw develops

　　(E) simulate the conditions that lobsters encounter in their natural environment

　　选 E

　　模仿龙虾在自然环境下使用螯的条件。需要抓东西。其实是用 crusher 捏碎，然后用 cutter 切断，再吃。

　　9.Which of the following conditions does the passage suggest is a possible cause for the failure of a lobster to develop a crusher claw?

　　(A) The loss of a claw during the third or earlier stage of development

　　(B) The loss of a claw during the fourth or fifth stage of development

　　(C) The loss of a claw during the sixth stage of development

　　(D) Development in an environment devoid of material that can be manipulated

　　(E) Development in an environment that changes frequently throughout the stages of development

　　选 D

　　回溯到句 7：

　　In contrast, when juvenile lobsters were reared in a smooth tank without the oyster chips, the majority developed two cutter claws.

　　没有 oyster chips，既然我们知道 oyster chips 用途就是给龙虾青少年抓的，所以可以认为作者暗示，没有发育出 crusher 是因为没有东西抓，manipulate 。

　　最后上两张图，看看是不是一个短粗，一个细长，我觉得其实差不太多，也可能我图找的没有代表性。

　　以上就是新东方在线GER频道为你带来的GRE阅读题目解析:美洲龙虾，更多精彩敬请关注新东方在线GRE频道。

本文关键字: GRE阅读 GRE阅读真题

上一页 1 2 下一页

添加新东方美研助教回复【GRE】获取

模考真题|写作题库|阅读机经|佛脚词汇

更多资料

添加美研助教号，
回复【GRE】获取备考必看资料包

  • 1.打开手机微信【扫一扫】，识别上方二维码；
  • 2.点击【添加美研助教号】，回复对应关键字领取学习资料。
更多>>
更多内容

关注新东方美研助教

回复【GRE】获取备考必看资料包

新东方美研备考资料
GRE录播课（全科班/单项班） GMAT6-8人直播VIP小班 托福直播精讲班（30天/60天）
更多>>
更多惊喜>>

添加美研助教号，
回复【GRE】获取备考必看资料包

  • 1.打开手机微信【扫一扫】，识别上方二维码；
  • 2.点击【添加美研助教号】，回复对应关键字领取学习资料。
更多>>
更多资料
我要
反馈 返回
首页
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10