北师大05-07考博英语真题清晰打印版

北京师范大学2005年博士生入学考试英语试题

Part I．Listening Comprehension(20 points) （略）

part II．Reading Comprehension (25 points)

Directions：There are five passages in this part．Each of the passages is followed by

five questions or unfinished statements．For each of them there are four choices

marked A，B，C and D．Choose the best one and mark your answer on the ANSWER

SHEET．

Passage one

A weather map is an important tool for geographers．A succession of three or four

maps present a continuous picture of weather changes．Weather forecasters are able to determine the speed of air masses and fronts; to determine whether an individual pressure area is deepening or becoming shallow and whether a front is increasing or

decreasing in intensity．They are also able to determine whether an air mass is retaining its original characteristics or taking on those of the surface over which it is

moving．Thus．a most significant function of the map is to reveal a synoptic picture of conditions in the atmosphere at a given time．

All students of geography should be able to interpret a weather map accurately．

Weather maps contain an enormous amount of information about weather conditions

existing at the time of observation over a large geographical area．They reveal in a

few minutes what otherwise would take hours to describe．The United States Weather

Bureau issues information about approaching storms，floods，fronts，droughts，and all climatic conditions in general．Twice a month it issues a 30-day“outlook’’which is a rough guide to weather conditions likely to occur over broad areas of the United

States．These 30-day outlooks are based upon an analysis of the upper air level which often set the stage for the development of air masses，fronts and storms．

Considerable effort is being exerted today to achieve more accurate weather

predictions．With the use of electronic instruments and earth satellites，enormous gains have taken place recently in identifying and tracking storms over regions which

have but few meteorological stations．Extensive experiments are also in progress for

weather modification studies．：

21. One characteristic of weather maps NOT mentioned by the author in this passage is _____

A．fronts B．changes in temperature C．frost D．wind speed

22．The 30-day forecast is determined by examining________.

A．daily weather maps

C．satellite reports

B．upper air levels

D．changing fronts

23．The observation of weather conditions by satellites is advantageous because it___

A. is modern and profitable for the companies involved

B. uses electronic instruments to measure the weather on a daily basis