首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
In science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model
In science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model
admin
2017-06-11
54
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 revised 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.
What is a major function of hypotheses as implied in the last paragraph?
选项
A、Sifting through known facts.
B、Communicating a scientist’s thoughts to others.
C、Providing direction for scientific research.
D、Linking together different theories.
答案
C
解析
本题是细节题。从最后一段的第四句话“For without hypotheses,furtherinvestigation lacks purpose and direction”,可知,若没有假设,深入的调查就会缺少目标和方向。所假设的一个主要作用就是给科研提供方向。故C正确。
转载请注明原文地址:https://kaotiyun.com/show/OtFO777K
0
考博英语
相关试题推荐
A、FurthermoreB、ConverselyC、AccordinglyD、NeverthelessDFurthermore表示“递进关系”;Conversely表示“完全相反的情形”;Accordingly表示“因果关系”,Neverthel
Onanaverageofsixtimesaday,adoctorinHollandpractices"active"euthanasiaintentionallyadministeringalethaldrugto
Whenthewillandconscienceoftheinternationalcommunityisdefied,wewillact—withpeacefuldiplomacywheneverpossible,with
Forlaymenethnologyisthemostinterestingofthebiologicalsciencesfortheveryreasonthatitconcernsanimalsintheirno
Intheprofessionswherewomen____numerically,itwouldbereasonabletoexpectthemtoholdseniorpositions.
Oneofthemajordifferencesbetweenmanandhisclosestlivingrelativeis,ofcourse,thatthechimpanzeehasnotdevelopedthe
Oneofthemajordifferencesbetweenmanandhisclosestlivingrelativeis,ofcourse,thatthechimpanzeehasnotdevelopedthe
_____near-perfectEnglishlanguageskills,thestudentswerekeentoexploreeveryaspectofAustralianculture,fromAussieeatin
ThoughIhadtriedtoexplainitasclearlyaspossible,myexplanationseemednotto_____.
随机试题
激素分为几类?
患者,女,18岁。突然剧烈头痛、呕吐。查体:颈项强直,克氏征阳性,布氏征阳性。CT:侧裂池、环池内高密度影。诊断首先考虑()
A、乙酰辅酶AB、乙酰乙酰辅酶AC、丙酰辅酶AD、草酰乙酸E、葡萄糖1体内合成胆固醇的主要原料是
护士为急性肾小球肾炎患儿家长指导出院后患儿的饮食注意事项中,告诉其停用低盐饮食的标准是
35kV以上的电力架空线与储量为200m3的液化石油气单罐的水平距离不应小于()。
对于采用投资补助、转贷和贷款贴息方式的政府投资项目,则只审批()。
项目管理中,从项目组织外部获得货物和服务(合称“产品”)的过程,是指
文字:编辑
替代性强化是班杜拉的社会学习理论中的一个概念,指一种榜样替代的强化。一般说来,学习者如果看到他人成功的行为、获得奖励的行为,就会增强产生同样行为的倾向;如果看到失败的行为、受到惩罚的行为,就会削弱或抑制发生这种行为的倾向。这样一来,对榜样行为的强化,通过学
北洋政府时期制定的专门刑法典是()。
最新回复
(
0
)