1、職稱英語等級考試理工AB模擬試題(3)第三部分：概括大意與完成句子(每題1分，共8分，建議10 分鐘以內完成)閱讀下面這篇短文，短文后有2項測試任務:(1)14題要求 從所給的6個選項中為第2-5段每段選擇1個正確的小標題;(2) 第5-8題要求從所給的6個選項中選擇4個正確的選項，分別完成 每個句子。請將答案涂在答題卡相應的位置上。難度B/A級Blasts from the past1 Volcanoes were more destructive in ancient history Not because they were bigger; but because the carbon

2、dioxide they released wiped out life with greater ease .2 Paul Wignall from the University of Leeds was investigating the link between volcanic eruptions and mass extinctions .Not all volcanic eruptions killed off large numbers of animals , but all the mass extinctions over the past 300 million year

3、s coincided with huge formations of volcanicrock To his surprise z the older the massive volcanic eruptions were z the more damage they seemed to do 3 Wignall calculated the1 killing efficiency nfor these voleanoes by comparing the proportion ion of life they killed off with the volume of lava that

4、they produced He found that size for size , older eruptions were at least 1 0 times as effective at wiping out life as their more recent rivals .4 The Permian extinction z for example , which happened 250 million years ago z is marked by floods of volcanic rock in Siberia that cover an area roughly

5、the size of western Europe . Those volcanoes are thought to have pumped out about 10 gigat onnes of carbon as carb on dioxide . The global warming that followed wiped out 80 per cent of all marine genera at the timeo And it took 5 million years for the planet to recover5 Yet 60 million years ago in

6、the late Palaeocene there was another huge amount of volcanic activity and global warming butIo mass extinction . Some animals did disappear but things returned to normal within ten thousands of years , HThe most recent ones hardly have an effect at allo M Wignail says He ignored the extinction whic

7、h wiped out the dinosaurs at the end of the Cretaceous /o 65 million years ago , because many scientists believe it was primarily caused by the impact of an asteroid .6 Wignall thinks that older volcanoes had more killing power because more recent life forms were better adapted to dealing with incre

8、ased levels of C02 . Ocean chemistry may also have played a role . As the supercontinents broke up and exposed more coastline there may have been more weathering of silica rocks . This would have encouraged the growth of phytoplankt on in the ocea ns。in creasing me amount of C02 absorbed from the at

9、mosphere 7 Vincent Courtillot director of the Paris Geophysical Institute in France , says that Wignalls idea is provocative . But he says it is incredibly hard to do these sorts of calculations He points out that the killing power of volcanic eruptions depends on how long they lasted . And it is im

10、possible to tell whether the huge blasts lasted for thousands or millions of yearso8 Courtillot also adds tllat it is difficult to estimate how much lava prehistoric volcanoes produced # and that lava volume may not n ecessarily correspond to carb on dioxide or sulphur dioxide emissions .練習：1 Paragr

11、aph 22 Paragraph 33 Paragraph 44 Paragraph 5A Killing Power of Ancie nt Vo lea nic Eruptio nsB Association of Mass Extinctions with Volcanic EruptionsC Calculation of the Killing Power of Older EruptionsD A Mass ExtinctionE V_0lcanic Eruptions That Caused no Mass ExtinctionF Accounting for the Killi

12、ng Power of Older Eruptions5 Older eruptions were more devastating6 The Permian extinction is used to illustrate7 The cause of the extinotion of dinosaurs8 Courtillot rejectsA than more recent onesB the killing efficiency for older eruptionsC has remained con troversialD Wignalls calculations as acc

13、eptableE has been known to us allF his ideas備注說明,非正文,實際使用可刪除如下部分。本內容僅給予閱讀編輯指點：1、本文件由微軟OFFICE辦公軟件編輯而成，同時支持WPS。2、文件可重新編輯整理。3、建議結合本公司和個人的實際情況逬行修正編輯。4、因編輯原因，部分文件文字有些微錯誤的，請自行修正，并不影響本文閱讀。Note: it is not the text. The following parts can be deleted for actual use. This content only gives reading and editing instructions:1. This document is edited by Microsoft office office software and supports WPS.2. The files can be edited and reorganized.3. It is suggested to revise and edit accordi