题目内容

CO₂ differs ________ both physical and chemical qualities ________ CO．

[　　]

A．

from; in

B．

in; from

C．

from; from

D．

in; in

答案：B
解析：

第一空是“在……方面不同”，用介词in；第二空是“和……不同”，用介词from。

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阅读理解（每小题2分，满分10分）
Instead of hitting the beach, fourteen high school students traded swimming suits for lab coats last summer and turned their attention to scientific experiments.
The High School Research Program offers high school students guidance with researchers in Texas A＆M’s College of Agriculture and Life Sciences．Jennifer Funkhouser, academic adviser for the Department of Rangeland Ecology and Management, directs this four-week summer program designed to increase understanding of research and its career potential (潜能).
Several considerations go into selecting students, including grades, school involvement and interest in science and agriculture．And many students come from poorer school districts, Funkhouser says．“This is their chance to learn techniques and do experiments they never would have a chance to do in high school.”
Warner Ervin of Houston is interested in animal science and learned how to tell male from female mosquitoes (蚊子)．His adviser, Craig Coates, studies the genes（基因） of mosquitoes that allow them to fight against malaria and yellow fever．Coates thought this experience would be fun and helpful to the high school students.
The agricultural research at A＆M differs from stereotypes（模式化，老一套）．It’s “molecular (分子) science on the cutting edge,” Funkhouser says．The program broadened students’ knowledge．Victor Garcia of Rio Grande City hopes to become a biology teacher and says he learned a lot about chemistry from the program.
At the end of the program, the students presented papers on their research．They’re also paid ＄ 600 for their work—another way this program differs from others, which often charge a fee.
Fourteen students got paid to learn that science is fun, that agriculture is a lot more than milking and plowing and that research can open many doors.
【小题1】．The research program is mainly designed for ______.

A．high school advisers from Houston

B．college studen

ts majoring in agriculture

C．high school students from different places

D．researchers at the College of Agriculture and Life Science

【小题2】．It can be inferred from the text that the students in poorer areas ____.

A．had little chance to go to college

B．could often take part in the program

C．found the program useful to their future

D．showed much interest in their high school experiments

【小题3】．When the program was over, the students ______.

A．entered that college

B．wrote research reports

C．paid for their research

D．found way to make money

【小题4】．The underlined expression “on the cutting edge” in paragraph 5 means “on the most _____ position.”

【小题5】．What would be the best title for the text?

A．A Program for Agricultural Science Students

B．A Program for Animal Science Students

C．A Program for Medical Science Lovers

D．A Program for Future Science Lovers

The Chinese language _______ many western languages _______ it uses characters which have meanings and can stand alone as words.

A．different from; in that	B．differs from; in which
C．differs from; in that	D．is different from; in which

CO₂ differs both physical and chemical qualities CO．

A.
from; in
B.
in; from
C.
from; from
D.
in; in

Climatic conditions are delicately adjusted to composition of the Earth's atmosphere. If there were a change in the atmosphere ― for example, in the relative amounts of atmospheric gases ― the climate would probably change also. A slight increase in water vapor (蒸汽) , for example, would increase the heat-keeping capacity of the atmosphere and would lead to a rise in global temperatures.

The level of carbon dioxide, CO₂, in the atmosphere has an important effect on climatic change. Most of the Earth's incoming energy is short-wavelength radiation (短波辐射) , which tends to pass through atmospheric CO₂ easily. The Earth, however, reradiates much of the received energy as long-wavelength radiation (长波辐射), which CO₂ absorbs and then goes toward the Earth. This phenomenon, known as the greenhouse effect, can result in an increase in the surface temperature of a planet. An extreme example of the effect is shown by Venus, a planet covered by heavy clouds composed mostly of CO₂, whose surface temperatures have been measured at 430~C.If the CO₂content of the atmosphere is reduced, the temperature falls. According to one respectable theory, if the atmospheric CO₂ concentration were halved, the Earth would become completely covered with ice. Another equally respectable theory, however, states that a halving of the CO₂ concentration would lead only to a reduction in global temperatures of 3℃.

If, because of an increase in forest fires or volcanic activity, the CO₂ content of the atmosphere increased, a warmer climate would be produced. Plant growth, which relied on both the warmth and the availability of CO₂, would probably increase. As a consequence, plant would use more and more CO₂. Eventually CO₂ levels would decrease and the climate, in turn, would become cooler. With reduced temperatures many plants would die; CO₂ would thus be returned to the atmosphere and gradually the temperature would rise again. Thus, if this process occurred, there might be a long-term oscillation (波动) in the amount of CO₂ present in the atmosphere, with regular temperature increase and decrease.

Some climatologists argue that the burning of fossil fuels has raised the level of CO₂ in the atmosphere and has caused a global temperature increase of at least 1℃. But a supposed global temperature rise of 1 ℃ may in reality be only several regional temperature increases, restricted to areas where there are many meteorological (气象的) stations. Other areas, for example, the Southern Hemisphere oceanic zone, may be experiencing an equal temperature decrease that is unrecognized because of the shortage of meteorological recording stations.

51. Which of the following questions does the information supplied in this passage try to answer?

A. What are the steps in the process that takes place as CO₂ absorbs long-wavelength radiation?

B. How might our understanding of the greenhouse effect be improved if the burning of fossil were decreased?

C. What might cause a series of regular increases and decreases in the amount of CO₂ in the atmosphere?

D. Why are there fewer meteorological recording stations in the Southern Hemisphere oceanic zone than atmosphere?

52. The author is primarily concerned with ________.

A. explaining the effects that the burning of fossil fuels might have on climate

B. explaining the effects of CO₂ on atmospheric radiation

C. discussing effects that changes in the CO₂ level in the atmosphere might have on climate

D. challenging hypotheses (假说) about the effects of water vapor and CO₂ on climate

53. The passage suggests that a large decrease in the amount of CO₂ in the atmosphere would result in _________.

A. at least a slight decrease in global temperatures

B. at the most a slight increase in short-wavelength radiation reaching the Earth

C. a slight long-term increase in global temperatures

D. a slight short-term increase in atmosphere water vapor content

54. The author refers to Venus primarily in order to _______.

A. show that the greenhouse effect works on other planets but not on Earth

B. show the degree to which Earth's atmosphere differs from that of Venus

C. support the opinion that as water vapor increases, the amount of CO₂ increases

D. support the argument that the CO₂ level in the atmosphere has a significant effect on climate

55. The discussion of climate in the passage suggests that _________.

A. climate is perfectly stable

B. we are unable at present to measure global temperature changes precisely.

C. the only cause of regional climatic fluctuations (波动) is the change in CO₂ 1evel in the atmosphere

D. slight regional temperature changes can be considered an abnormal feature (特征) of the environment

CO2 differs ________ both physical and chemical qualities ________ CO．

试题分类

CO₂ differs both physical and chemical qualities CO．