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[雅思机经]2016年7月9日雅思阅读真题回顾

来源:网络 2016-07-14 编辑:朗阁小编 雅思托福0元试学

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朗阁海外考试研究中心的雅思培训老师为考生带来2016年7月9日的真题回顾、详细解析及备考策略,此为雅思阅读回顾部分。

朗阁海外考试研究中心   赵瑜斌

朗阁海外考试研究中心的雅思培训为考生带来2016年7月9日的真题回顾、详细解析及备考策略,此为雅思阅读回顾部分。

考试日期:

201679日(完全重复2013323日考题)

 

Reading Passage 1

Title:

水獭Otter

Question types:

配对题9

简答题4

文章内容回顾

水獭的生活习性:A.腿、皮毛利于水性生活 B.水獭的感官敏感,尤其是嗅觉 C.水域范围达到一定程度才能在食物链上支撑水獭的生活D-E. Eurasian水獭生崽与崽的成长 F. British水獭受污染的困扰 G.水獭生态的渐复

题型难度分析

这篇难度不大,虽然有段落信息配对题,但是送分题简答题的难度非常小,而且由于是旧题,考生做起来应该比较顺手。

 

Reading Passage 2

Title:

伦敦桥梁

Question types:

多选题4(7选4)

摘要填空5

表格填空4

文章内容回顾

伦敦会晃动的桥的分析、工程*护、市政措施等。

相关英文原文阅读

London Swaying Footbridge

A

In September 1996 a competition was organized by the Financial Times in association with the London Borough of Southwark to design a new footbridge across the Thames. The competition attracted over 200 entries and was won by a team comprising Arup (engineers), Foster and Partners (architects) and the sculptor Sir Anthony Caro.

B

The bridge opened to the public on 10 June 2000. Up to 100,000 people crossed it that day with up to 2000 people on the bridge at any one time. At first, the bridge was still. Then it began to sway, just slightly. Then, almost from one moment to the next, when large groups of people were crossing, the wobble intensified. This movement became sufficiently large for people to stop walking to retain their balance and sometimes to hold onto the hand rails for support. It was decided immediately to limit the number of people on the bridge,but even so the deck movement was sufficient to be uncomfortable and to raise concern for public safety so that on 12 June the bridge was closed until the problem could be solved.

C

The embarrassed engineers found the videotape that day which showed the center span swaying about 3 inches side to side every second. The engineers first thought that winds might be exerting excessive force on the many large flags and banners bedecking the bridge for its gala premiere. What’s more, they also discovered that the pedestrians also played a key role. Human activities, such as walking, running, jumping, swaying, etc. could cause horizontal forces which in turn could cause excessive dynamic vibration in the lateral direction in the bridge. As the structure began moving, pedestrians adjusted their gait to the same lateral rhythm as the bridge. The adjusted footsteps magnified the motion-just like when four people all stand up in a small boat at the same time. As more pedestrians locked into the same rhythm, the increasing oscillations led to the dramatic swaying captured on film.

D

In order to design a method of reducing the movements, the force exerted by the pedestrians had to be quantified and related to the motion of the bridge. Although there are some descriptions of this phenomenon in existing literature, none of these actually quantifies the force. So there was no quantitative analytical way to design the bridge against this effect. An immediate research program was launched by the bridge’s engineering designers Ove Arup, supported by a number of universities and research organizations.

E

The tests at the University of Southampton involved a person walking ‘on the spot’ on a small shake table. The tests at Imperial College involved persons walking along a specially built, 7.2m-long platform which could be driven laterally at different frequencies and amplitudes. Each type of test had its limitations. The Imperial College tests were only able to capture 7-8 footsteps, and the ‘walking on the spot’ tests, although monitoring many footsteps, could not investigation normal forward walking. Neither test could investigate any influence of other people in a crowd on the behavior of the individual being tested.

F

The results of the laboratory tests provided information which enabled the initial design of a retro-fit to be progressed. However, the limitations of these tests was clear and it was felt that the only way to replicate properly the precise conditions of the Millennium Bridge was to carry out crowd tests on the bridge deck itself. These tests done by the Arup engineers could incorporate factors not possible in the laboratory tests. The first of these was carried out with 100 people in July 2000. The results of these tests were used to refine the load model for the pedestrians. A second series of crowd tests was carried out on the bridge in December 2000. The purpose of these tests was to further validate the design assumptions and to load test a prototype damper installation. The test was carried out with 275 people.

G

Unless the usage of the bridge was to be greatly restricted, only two generic options to improve its performance were considered feasible. The first was to increase the stiffness of the bridge to move all its lateral n

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