A student is doing an experiment with a spring. When the spring is stretched, what happens to its length? A. It becomes shorter. B. It stays the same. C. It becomes longer. D. It disappears. 相关知识点: 试题来源: 解析 C。弹簧被拉伸时长度会变长。选项 A 变短错误;选项 B 保持不...
A student is conducting an experiment to measure the angle between two vectors. Which of the following methods is correct? A. Using a stopwatch B. Using a balance C. Using a protractor D. Using a thermometer 相关知识点: 试题来源: ...
A student conducts an experiment in biology lab and discovers that the ratio of the number Of insects in a given population having characteristic X to the number of insects in the population not having characteristic X is 5:3, and that of the insects having characteristic X are male insects....
A student is performing an experiment with a blue liquid. When a certain chemical is added, the liquid turns green. What kind of reaction might this be? A. Oxidation B. Reduction C. Combination D. Displacement 相关知识点: 试题来源: ...
1One day, an expert did an experiment that the students would never forget. As he 1 in front of the students, he said, “OK, time for a(n) 2 .” He pulled out a wide-mouth 3 and set it on the table. He also took some fist-sized(拳头大小的)rocks and carefully 4 them into ...
One eager student raised her hand and said, "The point is, no matter how busy you are, if you try really hard you can always put some more things in!" "Good answer, but no," the speaker replied, "that's not my point. The truth this experiment teaches us is: If you don't put...
题目One day a teacher did an experiment his students would never forget. As he stood in front of the students,he pulled out a very big glass cup and put it on the table. He then took out some fist-sized (拳头大小的) rocks and carefully placed them,one at a ti...
答案:B 解析:a different kind表示泛指,作animals的定语,意思是"某种不同种类的动物".由于受到单词animals的干扰,一些考生误选了选项D.
83.4meters,”saidWangZi,aresearcherandPhDstudentattheInstituteofBotany. ZayulcountyislocatedinthemountainvalleyareabetweentheHimalayasandtheHengduan Mountains,withanaverageheightof2,800meters.Itsclimateisunique,complexanddiverse, withabundantannualrainfall,amildclimateandappropriatesunshine.TheNujiangRiverinZayul cou...
What will the ball do? A. Float in the air. B. Move sideways. C. Fall down. D. Rise up. 相关知识点: 试题来源: 解析 C。根据重力作用,球从一定高度落下会往下掉。A 选项是漂浮在空中,不符合重力规律;B 选项是向旁边移动,不合理;D 选项是上升,与实际情况不符。反馈 收藏 ...