留学社区

目录

2017年12月17日托福阅读考试小范围预测

字典 |

2017-12-05 17:44

|

【 liuxue86.com - 托福预测 】

  未雨绸缪是考试的最好状态,那么12月17日的考试预测怎么样呢?这是很多出国人士比较关心的问题,和出国留学网托福栏目一起来了解了解2017年12月17日托福阅读考试小范围预测,欢迎阅读。

  2017年12月17日托福阅读考试小范围预测

  Title:How Animals in Rain Forests Make Themselves Heard

  Scientists have discovered that animals are experts at exploiting weather conditions and the physical conditions of their environments so that they are heard or not heard, and seen or not seen. The species living in rain forests must engineer their calls to accommodate all of the obstacles, such as leaf cover, that can deflect and degrade the sounds intended for a potential receiver. Over, short, loud bursts of sound tend to be more effective than longer calls at cutting through the dense foliage.

  There is no natural environment on Earth noisier than a virgin rain forest. In the Peruvian rain forest, every species has developed clever or remarkably sophisticated strategies to ensure that its voice is heard. The noise creates a real challenge for the smaller residents, such as male tree crickets, which need to get the attention of females, often from a relatively long distance. Some species of crickets maximize the volume of their calls by chewing a hole in the middle of a leaf to create a sound baffle, similar to a stereo speaker. The leaf functions as a speaker cabinet, with the cricket in the center acting as the speaker.

  A species of tree frog in Borneo has an inventive approach to getting its mating call heard over the noise. Mataphrenella sudana, which is only an inch long, has learned to exploit the sound properties of a water-filled hole in a tree in the same way that a person uses resonance, the intensification and enrichment of a sound by added vibration, in the shower to sing like a professional performer.The frog searches for a suitable hole and then partially submerges itself in the water. Its forte is the ability to adjust the frequency of its call to the size of the hole and play the tree like a musical instrument. As it sits in the hole, it begins vocalizing at different frequencies until it hits the one note that makes the hole and tree resonate.

2017年12月17日托福考试机经预测汇总
托福 听力机经预测托福 口语机经预测
托福 阅读机经预测托福 写作机经预测

  The time of day affects how sound travels in any environment, and this fact is not lost on animals and insects. Early morning and late evening produce conditions that allow sound to travel greater distances than during the middle parts of the day. Sound travels best at night, which is why the rain forest is so wonderfully noisy between dusk and dawn. For species that sleep at night, dusk and dawn are their windows of opportunity to get the best resonance and distance out of a signal. This is why animals, especially birds, tend to be more active and noisy in the early morning and late evening. The British call the phenomenon of birds singing in the early morning the dawn chorus. Because of the superior sound conditions, dusk and dawn are the times to conduct the serious business of attracting mates and defending territory. For predators, it is the best time to track down their noisy prey.

  Another way animals and insects ensure that their calls connect with the intended receivers is by developing their own specialized frequencies, which are determined primarily by the size of their bodies. Recently, a scientist visiting the Peruvian rain forest made an audiotape of a little of the night’s music. When he took the tape back to his lab and analyzed it, he discovered that this seemingly chaotic banquet of sound was actually highly ordered. Each animal and insect is tuned to and calling on its own species-specific frequency, in the same way that radio stations use different signals so that many stations can broadcast at the same time.

  Bernard Krause, a professor at the University of Oregon in Eugene, has found that in older tropical rain forests some species, such as the Asian paradise flycatcher, have become so specialized that their voices occupy several niches of the sound spectrum at the same time, thus laying territorial claim to several audio channels. His recordings from undisturbed rain forests around the world demonstrate a remarkable stability in the combined voices of the residents from year to year. The stability of the ambient sound gives each region a unique sound signature, or fingerprint.

  Paragraph 1 Scientists have discovered that animals are experts at exploiting weather conditions and the physical conditions of their environments so that they are heard or not heard, and seen or not seen.The species living in rain forests must engineer their calls to accommodate all of the obstacles, such as leaf cover, that can deflect and degrade the sounds intended for a potential receiver. Over, short, loud bursts of sound tend to be more effective than longer calls at cutting through the dense foliage.

  1. To ” deflect” sounds means to change their

   direction

   volume

   frequency

   clarity

  2. The word ”potential” in the passage is closet in meaning to

   favorable

   possible

   expected

   chosen

  托福考试栏目为您推荐:

  2017年托福考试报名时间

  2017托福听力考试词汇汇总

  托福作文考试零基础备考常识汇总

  2017年9月托福高频词汇表

  2017年托福考试时间安排表

  2017年托福考试成绩查询入口

  托福听力 | 托福词汇 | 托福阅读 | 托福口语 | 托福真题

  想了解更多托福预测网的资讯,请访问: 托福预测

本文来源:https://toefl.liuxue86.com/t/3490267.html
延伸阅读
出国留学网整理了这次2018年7月7&8日托福预测汇总,有时间的朋友口语了解一下,希望对于大家有帮助。2018年7月7&8日托福预测汇总1  &
2018-07-06
对于2018年7月7&8日托福听力预测,同学们是否感到好奇呢?接下来就来看看有出国留学网整理的这次的听力预测吧!对话1内容回忆--女生接到宿管通知,后来知道是因为她把宿舍的
2018-07-06
在考前了解一些口语的预测题,大家可以在家里感受一下考试的氛围,那么接下来就和出国留学网来看看2018年7月7&8日托福口语预测。Doyouthinkthatstudents
2018-07-06
对于托福阅读预测,大家可以看看了解一下出题的方向,那么接下来就和出国留学网来看看2018年7月7&8号托福阅读预测。1.Thevadosezoneanditsstructu
2018-07-06
对于2018年7月的托福考试的同学来说,如果在考前做一套托福的预测,对于托福考试也是非常有帮助的,那么接下来就和出国留学网来看看吧!1.Thevadosezoneanditsstr
2018-07-06
未雨绸缪是考试的最好状态,那么12月17日的考试预测怎么样呢?这是很多出国人士比较关心的问题,和出国留学网托福栏目一起来了解了解2017年12月17日托福作文考试小范围预测,欢迎阅
2017-12-05
未雨绸缪是考试的最好状态,那么12月17日的考试预测怎么样呢?这是很多出国人士比较关心的问题,和出国留学网托福栏目一起来了解了解2017年12月17日托福听力考试小范围预测,欢迎阅
2017-12-05
未雨绸缪是考试的最好状态,那么12月17日的考试预测怎么样呢?这是很多出国人士比较关心的问题,和出国留学网托福栏目一起来了解了解2017年12月17日托福口语考试小范围预测,欢迎阅
2017-12-05
随着2017年9月17日托福考试的来临,很多学生奋力冲刺,下面是出国留学网托福栏目小编整理的2017年9月17日托福阅读考试小范围预测的情况,希望可以帮到您,更多内容请关注出国留学
2017-09-08
随着2017年9月17日托福考试的来临,很多学生奋力冲刺,下面是出国留学网托福栏目小编整理的2017年9月17日托福听力考试小范围预测的情况,希望可以帮到您,更多内容请关注出国留学
2017-09-08