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
2012-02-27
51
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 (运动的) 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 anymore 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.
According to the second paragraph, a useful theory is one that helps scientists to ______.
选项
A、observe events
B、find errors in past experiments
C、make predictions
D、publicize new findings
答案
C
解析
本题是细节题。原文说A useful theory,in addition to explaining past observations,helps to predict events that have not as yet been observed,所以C选项是正确答案。文中第一段说,在科学里,理论是对观察到的相关事件的合理解释。因此A、B选项错误。
转载请注明原文地址:https://kaotiyun.com/show/WiHO777K
0
在职攻硕英语联考
相关试题推荐
Geneticallymodified(GM)foodstuffsareheretostay.That’snottosaythatfoodproducedby【C1】______agriculturewilldisappear
Geneticallymodified(GM)foodstuffsareheretostay.That’snottosaythatfoodproducedby【C1】______agriculturewilldisappear
StandardEnglishisthevarietyofEnglishwhichisusuallyusedinprintandwhichisnormallytaughtinschoolsandtonon-nat
Apreviouslyunknowndisease,SARShasenteredourdailyvocabulary.Nowweliveinits【C1】______WhileSARS【C2】______centerstag
Littleboysseemtoenjoy______trainsetsmorethanlittlegirls.
Ishouldbeabletofinishthetaskontime,______youprovidemewiththenecessaryguidance.
Herremarks______acompletedisregardforhumanrights.
Bigcitiestodayareconfrontedwithveryseriousproblems.Transportisa【C1】______difficulty:someplannersbelievein【C2】____
Thelowinterestratesonbanksloansprovidedanimpetusformanytobuyhomes.
Ifitwereonlynecessarytodecidewhethertoteachelementarysciencetoeveryoneonamassbasisortofindthegiftedfewan
随机试题
人群关系
当前我国贸易顺差的主要来源地有
引起间歇性跛行的原因是
以人为中心,以护理程序为基础,以现代护理观为指南,对人实施从生理心理和社会各个方面的护理,从而使达到最佳健康状况的护理是
A、(4.0~10.0)×109/LB、(3.5~10.0)×109/LC、(15.0~20.0)×109/LD、(5.0~12.0)×109/LE、(10~15)×109/L成人末梢血白细胞计数是
登账时,为了保证账簿资料的清晰性和永久性,应采用()书写。
银行个人贷款产品定位的第一步是()。
角色采择技能是指()
ReadingTipsI.Three【T1】______phasesofreading【T1】______—beforereading—duringreading—afterreadingⅡ.Pre-readingt
WhydidthehumanrightsorganizationscriticizeMorocco?
最新回复
(
0
)