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
专升本
A、Close their eyes. B、Fly in circles. C、Hide in dark places. D、Cease moving. D
A、Close their eyes. B、Fly in circles. C、Hide in dark places. D、Cease moving. D
admin
2018-07-18
54
问题
Have you ever wondered why you see moths flying mostly at night, and then only around lights? It’s evident that moths are attracted to light, but what do you suppose the light does to them? Here’ s my theory. A moth’ s nervous system is extremely sensitive to light. I think that light causes the moth to reduce its movements.
At night, light hitting one side of a moth is perceived by the moth ’ s eye, stimulating the nervous system. This produces a reflex action that reduces wing movements on the side facing the light. When the wings on that side slow down, the uneven wing beat turns the other side of the moth to the light. In this way, the moth is continually turning near a light. During daylight hours, light is much more intense and evenly distributed, causing the moth to remain motionless.
Q:
18. What is main topic of the passage?
19. What does intense, even light cause moths to do?
20. What can be inferred from the speaker’ s comments about the flight of moths in total darkness?
选项
A、Close their eyes.
B、Fly in circles.
C、Hide in dark places.
D、Cease moving.
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/5gPC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
Manypeoplewronglybelievethatwhentheyreacholdage,theirfamilieswillplacetheminnursinghomes.Theywillbe【C1】_____
Manypeoplewronglybelievethatwhentheyreacholdage,theirfamilieswillplacetheminnursinghomes.Theywillbe【C1】_____
Oursisbetterthan_____.
Itwastheculture,ratherthanthelanguage,madeithardforhimtoadapttothenewenvironmentabroad.
Aroundtwoweeksago,Iwasinvitedtobeajudgeatacollege.Allofthestudents【C1】______apieceofpaperwithatopicwrit
OneBritishschoolisfindingthatallowingchildrentolistentomusicoreventohavetheTVonwhilestudyingishelpingimpr
在我们做出决定前,必须确定我们已经将所有相关因素考虑进去了。
Itisnaturalthatatreewouldgrowbestinaclimatewithplentyofsunlightandrainfall.
Listeningisanextremelycomplexcommunicativeactivity.Inordertohaveabetterunderstanding,toanticipatewhatiscoming
A、Closetheireyes.B、Flyincircles.C、Hideindarkplaces.D、Ceasemoving.D
随机试题
定积分|sin2x|dx的值是().
A.土元B.水元C.火元D.风元E.空
(2018年)甲公司编制现金预算的相关资料如下:资料一:甲公司预计2018年每季度的销售收入中,有70%在本季度收到现金,30%在下一季度收到现金,不存在坏账。2017年年末应收账款余额为零。不考虑增值税及其他因素的影响。资料二:甲公司2018年各季度
(2007年考试真题)下列有关个人独资企业设立条件的表述中,符合个人独资企业法律制度规定的有()。
()是中国自行研制的全球卫星导航系统,也是继GPS、GLONASS之后的第三个成熟的卫星导航系统。
Recently,Istoppedbyaconveniencestoretogetanewspaperandabottleofdrink.Theyoungwomanatthecheck-outcountersa
学习效率与学习动机的关系是()
下列情形中,属于犯罪中止的是()。
为books表建立两个普通索引,第一个索引名为“PK”,索引表达式为“图书编号”;第二个索引名和索引表达式均为“作者编号”。
MediaSelectionforAdvertisementsA)Afterdeterminingthetargetaudienceforaproductorservice,advertisingagenciesmusts
最新回复
(
0
)