show the effect of the independent variable C. make the experiment more complex D. have something to compare with the E. xperimental group 相关知识点: 试题来源: 解析 D。解析:实验中对照组的目的是与实验组进行比较。选项 A“prove the hypothesis”是证明假设,对照组不能直接证明假设。选项 B“...
解析 A。对照组的目的是提供一个比较,以确定实验处理是否产生了效果;“increase the sample size”是增加样本量,但不是对照组的主要目的;“make the experiment more complex”会使实验更复杂,但不是对照组的作用;“reduce the number of variables”是通过控制变量来实现的,不是对照组的目的。所以选 A。
When choosing a control group in an experiment, it should be as similar as possible to the experimental group to ensure ___. A. comparability B. diversity C. uniqueness D. contrast 相关知识点: 试题来源: 解析 A。选择对照组时应与实验组尽可能相似以确保可比性。选项 B“diversity”多样性,与...
The purpose of having a control group in an experiment is to ___. A. compare the results. B. make the experiment longer. C. use less materials. D. have more fun. 相关知识点: 试题来源: 解析 A。实验中设置对照组的目的是为了比较结果。选项 B 设置对照组不是为了使实验更长;选项 C 设置...
When scientists conduct an experiment, they need to control all the variables except the ___. A. independent variable B. dependent variable C. constant variable D. random variable 相关知识点: 试题来源: 解析 A。进行实验时,除了自变量外,科学家需要控制所有变量。“dependent variable”是因变量;“co...
In an experiment, we need to control variables to ensure the accuracy of the results. “Control variables” means ___. A. change variables B. keep variables the same C. increase variables D. decrease variables 相关知识点: 试题来源: 解析 B。“Control variables”的意思是控制变量,也就是保持...
When conducting an experiment, scientists need to control___. A. variables B. constants C. results D. hypotheses 相关知识点: 试题来源: 解析 A。进行实验时,科学家需要控制变量。选项 B“常量”、选项 C“结果”和选项 D“假设”都不是在实验中需要控制的主要对象。反馈...
Half of the subjects in an experiment--the experimental group--consumed large quantities of a popular artificial sweetener. Afterward, this group showed lower cognitive abilities than did the other half of the subjects--the control group--who did not consume the sweetener. The detrimental effects ...
Select Create > New experiment. Fill in the Subscription, Resource Group, and Location where you want to deploy the chaos experiment. Give your experiment a name. Select Next: Experiment designer. You're now in the Chaos Studio experiment designer. The experiment designer allows you to build ...
and P.R. carried out the experiment. E.Z. analysed the data and helped in numerical calculations. Z.W. and T.F.P. performed the theoretical modelling and numerical calculations. G.-B.J. and X.-J.L. conceived the project and supervised the research. E.Z., Z.W., X.-J.L. and ...