大学英语四级分类模拟题527
(总分192.5,考试时间90分钟)
Part Ⅰ Writing角马大迁徙
1.
Part Ⅱ Reading Comprehension
Passage One
小米流量
Water shortages on planet Earth? It ems impossible. Images of our planet from outer space show vast oceans, lakes as big as small countries, and wide rivers flowing with incredible volume. How can there not be enough water? But the fact is that the world is facing the prospect of water shortages caud by population growth, uneven supplies of water, pollution, and other factors. The United Nations predicts that water shortages could hinder the economic growth of some countries and lead to food shortages and, even possibly, to international conflicts.
Is there enough water for everyone in the world? According to the U.N. Commission on Sustainable Development, humans currently u about half of the 12,500 cu km (立方千米) of water that is readily available from groundwater, rivers, and lakes. So by a simple measure of liters and gallons, there is enough water to quench (结束) the thirst of every creature and plant, every field, and every industry now existing.
But water remains a fixed resource. "Given an expected population increa of about 50 percent in the next 50 years, coupled with expected increas in demand as a result of e
conomic growth and lifestyle changes, this does not leave much room for incread consumption," the U.N. commission said. A certain amount of water must be t aside to support the environment. Humans cannot drain the world"s lakes, rivers, and aquifers (蓄水层) without causing catastrophic (灾难性的) environmental damage.
The world"s population has been growing enormously. The U.N. estimates that it will be over 9 billion by 2050. The amount of water available to each person decreas as the population grows, raising the possibility of water shortages.高次不等式
Water shortages will **e all at once in every part of the world. Just as the world"s population is unevenly distributed by region, so is the annual supply of renewable water. Rainfall and snowfall are determined by uneven weather patterns and landscape, and as a result, some areas of the world get more precipitation (降水量) than others. This leads to the uneven distribution of water all over the world.
1. What"s the purpo to mention the images of our planet from outer space in the first paragraph?
A. To demonstrate the great impact of water shortages on Earth.
B. To show the rious problem of water shortages on Earth.
C. To explain why water shortages on Earth em impossible.
D. To prent the beauty of the Earth and our love for it.
2. What result will water shortages bring according to the passage?
青少年法律A. It will lead to population growth and uneven supplies of water.
B. It will make the prent vast oceans become derts.
C. It will have rious conquences for the well-being of humans.
D. It will impo an intolerable economic burden on all the residents on Earth.
落叶跳舞3. What will happen if humans drain the world"s lakes, rivers and aquifers?
A. The thirst of existing creature will be quenched.
B. The environment will be damaged verely.
苹果怎么卸载软件
C. The species diversity will not be totally mined.
D. Humans" lifestyles will be changed.
4. What can we know from the last paragraph?
A. Uneven supplies of water are caud by uneven distributed population.
云台山攻略
B. Water shortages will break out in every country simultaneously some day.
C. Some areas won"t suffer water shortages becau they have more lakes and rivers.
D. The annual supply of renewable water is determined by weather patterns and landscape.
5. What does the author intend to convey in writing this passage?
A. Water shortages have had rious effects on society.
B. Water remains a fixed resource but the need for it continues increasing.
C. The world has to deal with the problems arising from water shortages.
D. The world is facing the danger of water shortages.
琴颈调节方向
Passage Two
Rearchers in the field of psychology have found that one of the best ways to make an important decision, such as choosing a university to attend or a business to invest in, involves the utilization of a decision worksheet. Psychologists who studyoptimization(最优化) compare the actual decisions made by people to theoretical ideal decisions to e how similar they are.Proponents(支持者) of the worksheet procedure believe that it will yield optimal, that is, the best decisions. Although there are veral variations on the exact format that worksheets can take, they are all similar in their esntial aspects. Worksheets require defining the problem in a clear and conci way and then listing all possible solutions to the problem. Next, thepertinent(相关的) considerations that will be af
fected by each decision are listed, and the relative importance of each consideration or conquence is determined. Each consideration is assigned a numerical value to reflect its relative importance. A decision is mathematically calculated by adding the values together, The alternative with the highest number of points emerges as the best decision.
