2009年职称英语综合类B级阅读理解真题答案三

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2009年度全国职称外语等级考试试卷 英      语 综合类B级   阅读理解(第41～45题，每题3分，共15分)。请根据短文内容，为每题确定1个最佳选项。   第三篇Water     The second most important constituent(构成成份)of the biosphere(生物圈)is liquid water, This can only exist in a very narrow range of temperatures，since water freezes at 0°C and boils at 100°C. Life as we know it would only be possible on the surface of a Planet which had temperatures somewhere within this narrow range.
    The earth’s supply of water probably remains fairly constant in quantity. The total quantity of water is not known very accurately, but it is about enough to cover the surface of the globe to a depth of about two and three-quarter kilometers Most of it is in the form of the salt water of the oceans-about97 per cent The rest is fresh，but three-quarters of this is in the form of ice at the Poles and on mountains and cannot be used by living systems until melted Of the remaining fraction, which is somewhat less than one percent of the whole．there is 10-20 times as much stored underground water as there is
actually on the surface There is also a tiny, but extremely important fraction of the water supply which is present as water vapour in the atmosphere.
    Water vapour in the atmosphere is the channel through which the whole water circulation(循环)of the biosphere has to pass Water evaporated(蒸发)from the surface of the oceans, from lakes and rivers and from moist(潮湿的)earth is added to it. From it the water comes out again as rain or snow, falling on either the sea or the land. There is, as might be expected，a more intensive evaporation per unit area over the sea and oceans than over the land, but there is more rainfall over the land than over the oceans and the balance is restored by the runoff from the land in the form of rivers
41 Liquid water only exists
A in the center of the earth
B on the surface of our planet
C in a very narrow range of temperatures
D in the coastal areas of the earth
42 The total quantity of water on Earth
A remains almost unchanged
B has greatly increased in recent years
C is decreasing constantly
D is affected by global warming
43 Most of the flesh water on Earth
A is stored underground
B Is in the form of ice at the Poles and on mountains
C is found in rivers and lakes
D comes from the rain
44 The word “fraction” in the second paragraph means
A a very small amount
B a large area
C an important system
D a major source of information
45 There is more rainfall
A over the mountains than over the rivers
B over the rivers than over the mountains
C over the oceans than over the land
D over the land than over the oceans 【参考答案】
31. Liquid water only exists ___. .
答案为C: in a very narrow range of temperature. (很小的温度范围中)
32. The total quantity of water on Earth ___.
答案为A: remains almost unchanged. （几乎保持不变）（该题考察近义词的识别： unchanged -- constant）
33. Most of the fresh water on Earth ___.
答案为B： is in the form of ice at the poles and on the mountains (在地球上的两极及高山上以冰的形式出现)
34.the word “fraction”in the second paragraph means____.
答案为A：a very small amount.(很少量的)（该题可以通过翻查词典直接判断出答案）
35. There is more of rainfall ___. .
答案为D： over the land than over the oceans.  (陆地上的降雨量大于海洋上的降雨量)     .

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