发布时间 : 星期六 文章新视野大学英语4网络自主学习测验试卷四及答案更新完毕开始阅读
B. deeply involved in energy crisis
C. ready for the solar power project
D. crippled by the financial problems
73. Proposition B ________.
A. allowed the city to carry out each clean-energy project without a vote
B. allowed San Francisco to impose new taxes on its citizens
C. doubled the entire country's capacity of power generation
D. eased the city's financial burden in the form of $100 million revenue bonds
74. Casper's group focused their efforts on ________.
A. city districts they thought would be most likely to vote in favor if informed
B. the five energetic organizers fresh out of school
C. religious groups showing great responsibility for environment
D. leaflets distribution and telephone calls
75. Which city is in line to be the next solar city in California?
A. Boulder.
B. San Diego.
C. Colorado.
D. San Francisco.
Questions 76 to 80 are based on the same passage or dialog. Planetary (行星的) scientists are set to write the opening chapter of A Tale of Two Comets (彗星) with next Monday's launch of Contour, an
unprecedented (空前的) mission that will peer into the cores of two comets over the next four years.
Where ground-based astronomers (宇航员) can see only a glowing ball whose core is shrouded (遮蔽) in dust and gas, Contour will be able to pierce that veil—and spot details in the comet's nucleus only 12 feet across.
For hundreds of years, comets have caught the human imagination. But only recently have they come within reach of science's virtual grasp—first through optical and radio telescopes, then via spacecraft.
The Contour will encounter the comets in November 2003 and it promises, with a clearer picture of their structures and locations, to expand
understanding of these mysterious comets. Their collisions with a young Earth are thought to have supplied the planet with water and other
chemical compounds necessary to give rise to organic life, and to have altered the course of evolution.
Armed with Contour's observation facilities, as well as with data from past comet flybys, researchers will be able to explore the diversity of comets arising at different stages of their life cycle. \in exploring comets,\astronomy (天文学) department and Contour's lead investigator.
76. What can Contour do?
A. To send astronauts to comets.
B. To see a glowing ball.
C. To spot the cores of two comets.
D. To peer into the dust and gas.
77. What's true about comets?
A. Their diameters are only 12 feet.
B. Their cores are hard to pierce and observe.
C. They are full of water and other compound chemicals.
D. They have altered the course of evolution.
78. Why didn't planetary scientists explore the mysteries of comets
before?
A. Because comets are shrouded in dust and gas.
B. Because the scientists are not ready to write A Tale of Two Comets.
C. Because the scientists did not have a clear picture of their locations.
D. Because it was only recently that the study of comets became a possibility.
79. What does the word \
A. Flight.
B. Spacecraft.
C. Airplane.
D. Cores.
80. What's the essential significance of Contour's mission?
A. Helping astronomers have a clearer picture of comets than before.
B. Having a clear picture of their structure and location.
C. Exploring the diversity of comets arising at different stages of their lifecycle.
D. Obtaining data from past comet flybys.
Questions 81 to 85 are based on the same passage or dialog. Are organically grown foods the best food choices? The advantages claimed for such foods over conventionally grown and marketed food products are now being debated. Advocates of organic foods—a term
whose meaning varies greatly—frequently proclaim that such products are safer and more nutritious than others.
The growing interest of consumers in the safety and nutritional quality of the typical North American diet is a welcome development. However, much of this interest has been sparked by sweeping claims that the food supply
is unsafe or inadequate in meeting nutritional needs. Although most of these claims are not supported by scientific evidence, the great number of written material advancing such claims makes it difficult for the general public to separate fact from fiction. As a result, claims that eating a diet consisting entirely of organically-grown foods prevents or cures disease or provides other benefits to health have become widely publicized and popular among customers.
Almost daily the public is surrounded by claims for \vitamins, and other wonder foods. There are numerous unsubstantiated (无确实根据的) reports that natural vitamins are superior to synthetic ones, that fertilized eggs are nutritionally superior to unfertilized eggs, that untreated grains are better than fertilized grains, and the like.
One thing that most organically grown food products seem to have in common is that they cost more than conventionally grown foods. But in many cases consumers are misled if they believe organic foods can maintain health and provide better nutritional quality than conventionally grown foods. So there is real cause for concern if consumers, particularly those with limited incomes, distrust the regular food supply and buy only expensive organic foods instead.
81. The word \
following?
A. Supporters.
B. Merchants.
C. Inspectors.
D. Consumers.
82. What does the word \
A. Advantages.
B. Advocates.
C. Organic foods.
D. Nonorganically-grown products.
83. The author implies that there is cause for concern if consumers with
limited incomes buy organic foods instead of conventionally grown foods because ________.
A. organic foods can be more expensive but are often no better than conventionally-grown foods
B. many organic foods are actually less nutritious than similar conventionally-grown foods
C. conventionally-grown foods are more readily available than organic foods
D. too many farmers will stop using conventional methods to grow food crops
84. According to the last paragraph, consumers who believe that organic
foods are better than conventionally-grown foods are often ________.
A. careless
B. mistaken
C. mistaking
D. wealthy
85. What is the author's attitude toward the claims made by advocates of
health foods?
A. Very enthusiastic.
B. Somewhat favorable.
C. Neutral.
D. Doubtful.