What is this process called? A. melting B. freezing C. boiling D. evaporating 相关知识点: 试题来源: 解析 A。选项 A“melting”是融化,固体变为液体;选项 B“freezing”是凝固,液体变为固体;选项 C“boiling”是沸腾;选项 D“evaporating”是蒸发,液体变为气体。反馈 收藏 ...
In an experiment, if the independent variable is changed, what might also change? A. Dependent variable B. Control variable C. Constant variable 相关知识点: 试题来源: 解析 A。理解科学实验中的变量关系,自变量改变可能导致因变量改变,答案是 A。
The experiment showed a ___ change in color. A. sudden B. gradual C. quick D. immediate 相关知识点: 试题来源: 解析 B。本题考查形容词辨析。sudden 表示突然的;gradual 表示逐渐的;quick 表示快速的;immediate 表示立即的。实验中颜色变化通常是逐渐的,所以选 gradual。反馈 ...
In an experiment, if you change the temperature, what is the temperature? A. Dependent variable. B. Independent variable. C. Control variable. D. Unknown variable. 相关知识点: 试题来源: 解析 B。在实验中,如果改变温度,温度是自变量。因为温度是由实验者改变的。选项 A 因变量是随着自变量变化而...
When conducting an experiment, we should ___. A. change the variables randomly B. record the results carefully C. guess the outcome D. skip some steps if they seem difficult 相关知识点: 试题来源: 解析 B。本题考查科学实验的正确做法。选项 A“change the variables randomly”随机改变变量是错误...
In a scientific experiment, an unexpected change in the environmental temperature during the experiment is likely to cause _. A. a systematic error B. a random error C. no error at all D. an E. rror that can be predicted in advance 相关知识点: ...
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A. change the results if they are not what you want B. do it only once and believe the result C. repeat the experiment several times D. guess the result and write it down 相关知识点: 试题来源: 解析 C。做实验时应该重复实验几次。A 改变结果是不道德且错误的。B 只做一次不可靠。D 猜...
wildfires.Meanwhile,anunprecedented(史无前例的)week-longstorminJuly2021causedflash floodsandmudslidesinWesternEurope.ClimatechangeisevenimpactingtheEarth?scoldestand mostremoteregionswhichexperiencedthefirstrainfalleventinrecordedhistory. Thesituationmaysoundhopeless.However,manyexpertsbelieveitisstillnottoolateto turn...