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
2013-01-19
80
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)
The reason the author considers "hypothesis" as "a leap into the unknown" is that______.
选项
A、it is not reliable
B、it is a kind of adventure
C、it goes beyond gathered facts
D、it requires too much unrealistic effort to formulate
答案
C
解析
最后一段第二句就是对第一句话的解释。
转载请注明原文地址:https://kaotiyun.com/show/9t2O777K
0
考博英语
相关试题推荐
Moderntechnologyandsciencehaveproducedawealthofnewmaterialsandnewwaysofusingoldmaterials.Fortheartistthism
InarecentbookentitledThePsychicLifeofInsects,ProfessorBouviersaysthatwemustbecarefulnottocreditthelittlew
Thebusinessofadvertisingistoinventmethodsofaddressingmassiveaudiencesinalanguagedesignedtobeeasilyaccessible
Manyofthefadsofthe1970s______astoday’slatestfashions.
Inthisexperiment,theyarewakenedseveraltimesduringthenight,andaskedtoreportwhatthey______.
AnOhioStateUniversitystudyhaslinkedbehaviorinyoungchildren【1】thetypeofjobtheirmotherhas.Motherswithcomplexoc
Thestudentswillputoffthematchuntilnextweek,______theywon’tbesobusy.
Ourape-menforefathershadnoobviousnaturalweaponsinthestruggleforsurvivalintheopen.Theyhadneitherthepowerfult
Ourape-menforefathershadnoobviousnaturalweaponsinthestruggleforsurvivalintheopen.Theyhadneitherthepowerfult
Hetoldastoryabouthissisterwhowasinasad______whenshewasillandhadnomoney.
随机试题
建筑结构应具有的功能有()。
某市政府依王某申请,作出行政复议决定,撤销市国土房管局对王某房屋的错误登记,并责令市国土房管局在一定期限内重新登记。市国土房管局拒不执行该行政复议决定,王某有权采取的措施是()。
Forthispart,writingaparagraphinabout100-120wordsbasedonthefollowingsituation.RemembertowriteitclearlyonANSW
易发生幽门梗阻的溃疡是
双胍类降血糖药的严重不良反应是
某公司在财产清查中发现盘盈设备一台,已知同类设备的历史成本为20000元,重置成本为15000元。不考虑其他因素,下列各项中,该公司盘盈设备时的会计处理正确的是()。
布里丹教授在书中写到,一头驴在两捆完全等量的草之间,犹犹豫豫、来来回回,不知道选择吃哪一捆.最后在无所适从中活活饿死。后来人们把这种在决策过程中犹豫不定,迟疑不决的现象称为“布里丹毛驴效应”。根据上述定义.下列属于“布里丹毛驴效应”的是:
Everythingseemedtohavebecomeaweaponofwar.Ourenemieshad(1)_____themostfamiliarobjects(2)_____us,turnedshaving
Accordingtocertainbeercommercials,thecontemporaryversionofsuccess【C1】______inmovinguptoapremiumbrandthatcostsa
AccordingtoBT’sfuturologist,IanPearson,theseareamongthedevelopmentsscheduledforthefirstfewdecadesofthenewmil
最新回复
(
0
)