首页
登录
职称英语
In science, a theory is a reasonable explanation of observed events that are
In science, a theory is a reasonable explanation of observed events that are
游客
2025-04-24
28
管理
问题
In science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of this is found in the kinetic molecular theory, in which gases are pictured as being made up of many small particles that are in constant motion.
A useful theory, in addition to explaining past observations, helps to predict events that have not as yet been observed. After a theory has been publicized, scientists design experiments to test the theory. If observations confirm the scientists’ predictions, the theory is supported. If observations do not confirm the predictions, the scientists must search further. There may be a fault in the experiment, or the theory may have to be re-vised or rejected.
Science involves imagination and creative thinking as well as collecting information and performing experiments. Facts by themselves are not science. As the mathematician Jules Henri Poincare said: "science is built with facts just as a house is built with bricks, but a collection of facts cannot be called science any more than a pile of bricks can be called a house. "
Most scientists start an investigation by finding out what other scientists have learned about a particular problem. After known facts have been gathered, the scientist comes to the part of the investigation that requires considerable imagination. Possible solutions to the problem are formulated. These possible solutions are called hypotheses.
In a way, any hypothesis is a leap into the unknown. It extends the scientist’s thinking beyond the known facts. The scientist plans experiments, performs calculations, and makes observations to test hypotheses. For without hypotheses, further investigation lacks purpose and direction. When,hypotheses are confirmed, they are incorporated into theories. (296 words) [br] In the fourth paragraph, the author implies that imagination is most important to scientists when they
选项
A、evaluate previous work on a problem
B、formulate possible solutions to a problem
C、gather known facts
D、close an investigation
答案
B
解析
此题要从最后一句往前理解,即科学家要做假设.要想出可能解决问题的方法,这就需要想像力。
转载请注明原文地址:http://tihaiku.com/zcyy/4051602.html
相关试题推荐
Theintellectually______enterpriseofsciencedependsonfreecommunication.A、d
Inscience,atheoryisareasonableexplanationofobservedeventsthatare
Inscience,atheoryisareasonableexplanationofobservedeventsthatare
TheeventsofSept.11haveratchetedupsecurityatAmericanairportstothe
TheeventsofSept.11haveratchetedupsecurityatAmericanairportstothe
Economicshaslongbeenknownasthedismalscience.Butisanyeconomistso
Economicshaslongbeenknownasthedismalscience.Butisanyeconomistso
Economicshaslongbeenknownasthedismalscience.Butisanyeconomistso
Itisoftenobservedthattheagedspendmuchtimethinkingandtalkingabou
Itisoftenobservedthattheagedspendmuchtimethinkingandtalkingabou
随机试题
[originaltext]M:Hi,Nancy.CouldIborrowsomemoneyuntilpayday?W:Uh,yeah
地形/地势terrain
Ahurricane(飓风)isapowerful,rotatingstormthatformsoverwarmoceansn
Girlsthinktheyarecleverer,moresuccessfulandharderworkingthanboys
正常成人妇女乳腺通常不包括的组成内容是A.平滑肌 B.腺叶 C.小叶 D.
2012年,A省完成港口货物吞吐量13.3亿吨,同比增长14.2%,其中外贸货物
Thechangeinthatvillagewasmiraculou
对万古霉素特点叙述鳢误的是A.与其他抗生素之间无交叉耐药性B.对G球菌作用强C.
在进行任务分析时,教师要从()出发,一级子目标、一级子目标地揭示其先决条
(2015年真题)下列有关样本规模的说法中,正确的是( )。A.在控制测试中,
最新回复
(
0
)