时代学习网——职业考试网上辅导的家园
Scientists had previously speculated that cryptic species were predominantly found in insects and reptiles, and were more likely to occur in tropical rather than temperate regions. “Species that are seemingly widespread and abundant could in reality be many different Cryptic species that have low populations and are highly endangered,\least one taxon is thoroughly studied, no one will know just how many cryptic species exist, \
\of Guelph2 in Ontario3, Canada. \of genetic studies that we are doing. \
Sampling as many individuals as possible, scientists hope to complete. work on all fish and birds in another 5 to 10 years. Once either of these taxonomic groups is completed, Pfenninger says researchers will be able to decide how many cryptic species exist throughout the animal kingdom.
Examples of cryptic species include the African elephant. A 2001 study found the elephants were actually two genetically distinct, non-interbreeding species, the African bush elephant and the African elephant. The species are currently listed as vulnerable and threatened, respectively, by the World Conservation Union (WCU)1. The reclassifications are more than an academic exercise. They define populations that have evolved independently of each other and whose genetic differences can have significant consequences.
In the early 1900s misidentification of mosquito species based on morphology confused: attempts to control malaria in Europe. Ultimately, what was thought to be a single species was actually made up of six sibling species, only three of which transmitted the disease. \have to know what you are dealing with,\is now no longer used, he Says, because it is not clear what species was being studied. 41. Which of the following about the significance of the research on cryptic species is NOT true?
A The results of the research can help the development of many other research areas.
资料由www.nowxue.com网收集整理。
时代学习网——职业考试网上辅导的家园
B The results of the research can help the development of biodiversity estimates. C The results of the research can help our understanding of infectious disease evolution.
D The results of the research can help our understanding of \fittest. \
42. What was scientists' understanding of cryptic species? A They occurred in equal numbers in all biogeographical regions. B They were mostly found in insects and reptiles.
C They were likely to be in tropical rather than temperate regions. D Both Band C.
43. Do scientists know how many cryptic species exist? A Not yet. B Yes, they do.
C They will know the answer in another one or two-years. D They will never know the answer.
44. Which of the following about the African bush elephant and the African elephant is true?
A The WCU are interbreeding those elephants. B They are interbreeding species.
C They are two genetically distant species. D They depend on each other for survival.
45. People were confused in their attempts to control malaria in Europe in the early 1900s. because scientists
资料由www.nowxue.com网收集整理。
时代学习网——职业考试网上辅导的家园
A identified only one mosquito species instead of six species. B thought only three mosquito species transmitted disease. C thought there was only one mosquito species. D did not know what species was being studied. 第5部分：补全短文(第46～50题，每题2分，共10分)?
阅读下面的短文，文章中有5处空白，文章后面有6组文字，请根据文章的内容选择5组文字，将其分别放回文章原有位置，以恢复文章原貌。请将答案涂在答题卡相应的位置上。?
Comparative Labor Costs?
46 . Together, they constitute the unit labor cost involved in producing a commodity. ?
Some countries may find that the labor wages are very low, yet they are not in a competitive position when trading with other countries, whose labor wages are very high. ?
47 . On the other hand, some countries find that their productivity is much higher than that of their trading partners, yet they are not in a competitive trading position either. This is because their labor wages are much higher than those of their trading partners. 48 . For instance, wages are low in most developing countries. 49 . Their productivity is low too. Success depends on the unit labor cost of the products in certain industries, such as radio production and television set assembling, unit labor cost may be low, and thus they would be in a competitive position, while in others, low labor wages are offset(抵消) by very low productivity. Their unit labor cost is high and they are in an unfavorable position in trading with other countries. ?
Unit labor cost is an important determinant of prices of manufactures goods, but other costs also influence prices:notably, those of capital, energy, and raw materials. 50 . ?
资料由www.nowxue.com网收集整理。
时代学习网——职业考试网上辅导的家园
A Moreover, a country’s competitive position is not solely determined by price salesmanship(销售术)，credit terms, adherence to delivery schedules and so on also affect competitiveness?
B At least two factors determine a country’s comparative position:labor productivity and wage level?
C So it is the unit labor cost which determines the competitive position, but not only low wages or only high productivity?
D This may be because they neglect their low productivity?
E Does this mean that these countries are in a favorable position in trade?It is not necessarily so?
F Generally speaking, all the countries are paying more and more attention to their wage levels?
第6部分：完型填空(第51～65题，每题1分，共15分)?
阅读下面的短文，文中有15处空白，每处空白给出4个选项，请根据短文的内容从4个选项中选择1个最佳答案，涂在答题卡相应的位置上。? Cell Phone Lets Your Secret Out
Your cell phone holds secrets about you. Besides the names and 51 that you've programmed into it, traces of your DNA linger on the device, according to a new study. DNA is genetic material that 52 in every cell. Like your fingerprint, your DNA is unique to you-- 53 you have an identical twin. Scientists today routinely analyze DNA in blood, saliva, or hair left 54 at the scene of a crime. The results often help detectives identify 55 and their victims. Your cell phone can reveal more about you 56 you might think.
Meghan J. McFadden, a scientist at McMaster University in Hamilton, Ontario, heard about a crime in which the suspect bled onto a cell phone and later dropped the 57 This made her wonder whether traces of DNA lingered on cell phones--even when no blood was involved. 58 she and colleague Margaret Wallace of the City University of New York analyzed the flip-open phones of 10 volunteers. They used swabs to collect
资料由www.nowxue.com网收集整理。
时代学习网——职业考试网上辅导的家园
59 traces of the users from two parts of the phone: the outside, where the user holds it, and the 60 , which is placed at the user's ear.
The scientists scrubbed the phones using a solution made mostly 61 alcohol. The aim of washing was to remove all detectable traces of DNA. The owners got ,Heir phones 62 for another week. Then the researchers collected the phones and repeated the swabbing of each phone once more.
The scientists discovered DNA that 63 to the phone's speaker on each of the phones. Better samples were collected from the outside of each phone, but those swabs also picked up DNA that belonged to other people who had apparently also handled the phone. 64 , DNA showed up even in swabs that were taken immediately after the phones were scrubbed. That suggests that washing won't remove all traces of evidence from a criminal's device. So cell phones can now be added to the 65 of clues that can clinch a crime-scene investigation.
51. A numbers B music C secrets D films 52. A appeals B appoint C appears D applies 53. A because B unless C although D still 54. A about B in C for D behind
55. A criminals B people C men D policemen 56. A when B until C before D than 57. A device B paper C file D document 58. A However B So C But D Nevertheless
59. A invisible B non-existent C visible D apparent 60. A card B keys C screen D speaker 61. A of B up C on D into
62. A upon B back C without D with
63. A was given B belonged C was owned D became
资料由www.nowxue.com网收集整理。
时代学习网——职业考试网上辅导的家园
64. A Generally B Surprisingly C Disappointedly D Shortly 65. A explanation B discovery C book D list 答案
全国专业技术人员职称英语等级考试理工类(A级)模拟试题(一)参考答案 1 C 2 C 3 D 4 B 5 C 6 A7 C 8 C 9 B 10 A 11 C 12 A 13 A14 C 15 D
16 B 17 B 18 A19 A 20 A? 21 C 22 B 23 D 24 C 25 E 26 A 27 E 28 B 29 A 30 F 31 B 32 B 33 C 34 D 35 A 36 C 37 A 38 B 39 D 40 B 41 D 42 D 43 A 44 C 45 A 46 B 47 D 48 C 49 E 50 A 51 A 52 C 53 B 54 D 55 A 56 D 57 A 58 B 59 A 60 D 61 A 62 B 63 B 64 B 65 D
资料由www.nowxue.com网收集整理。
百度搜索“77cn”或“免费范文网”即可找到本站免费阅读全部范文。收藏本站方便下次阅读，免费范文网，提供经典小说教育文库2009年职称英语考试模拟冲刺题及参考答案一(理工类A)(3)在线全文阅读。
相关推荐：