题目
题型:不详难度:来源:
To investigate when cockroaches(蟑螂) learn best, researchers at Vanderbill University tested the insects for which odor(peppermint 薄荷 or vanilla 香草) they preferred. Most cockroaches preferred the smell of vanilla to that of peppermint at all times. _小题2:_ Therefore, the scientists trained the cockroaches to prefer the peppermint smell by rewarding the insects with a taste of sugar water when they approached a peppermint smell. _小题3:__
When the cockroaches were trained at night, they remembered the new associations(peppermint=sugar water; vanilla=salt water) for up to 48 hours. However, if the cockroaches were trained in the morning, they quickly forgot which smell went with which water. __小题4:_
So, cockroaches learn better at night than they do in the morning. _小题5:_ Because of this, it is likely that information they gather at night will be more useful to them. These experiments provide some clues about the interactions between body rhythms, learning and memory.
A.When these insects moved toward a vanilla smell, on the other hand, they were punished with a taste of salt. |
B.This result thus shows that the time when they were trained decided the effect of their learning. |
C.They are often more active and tend to search for food during the night. |
D.They were also found to like sugar water, but not salt water. |
F.But they prefer warm conditions found within buildings.
G.Pest species adapt easily to their environment.
答案
小题1:E
小题2:D
小题3:A
小题4:B
小题5:C
解析
科学家通过试验说明了蟑螂更适于夜间行动,在夜间它们身体的各个机能都好于早晨,所以工作效率也会更高。
小题1:E 前面说到你不再孤单,即还有别人像你一样不喜欢早起、不喜欢早上学习,所以接下来就要说有同样问题的人或物是谁了。故选E项。
小题2:D 根据下文中“with a taste of sugar water...”可知选D项。
小题3:A 本段介绍了蟑螂对糖水和盐水不同反应的试验,前面介绍了糖水,接下来肯定要说到盐水。故选A项。
小题4:B 此处是一个总结句,是对以上试验的一个结论。故选B项。
小题5:C 试验证明了蟑螂在夜间的反应更快,所以效率也会更高。故选C项。
核心考点
试题【Do you have trouble getting started in the morning? Do you have problems learnin】;主要考察你对数词等知识点的理解。[详细]
举一反三
A.appetite | B.taste | C.factor | D.feature |
A.distinguishing | B.highlighting | C.examining | D.updating |
A recent study suggests that students who bring water into exams may improve their grades by 10 percent.
Scientists then小题1:____(比较) their exam results with their normal schoolwork grades.They found that all those 小题2:______had brought drinks with them got better grades.
Scientists also considered the students "schoolwork and小题3:_____(预计)their grades.This was to make sure that the reason was not simply that smarter students were more小题4:________(有可能)to bring drinks with them.
小题5:______is unclear why drinking water improves exam results.But scientists say having enough water in our小题6:b and not feeling thirsty could have a helpful effect 小题7:________our brains.Drinking water may also cut小题8:d_____ on anxiety ,which affects exam performances.
So next time,小题9:w you are going to have a big exam,try bringing a bottle of water with you.Who knows—it may help you小题10:p the exam!
A.thorough | B.significant | C.frequent | D.permanent |
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