首页
登录
职称英语
[originaltext] Monarch butterflies are a common summer sight in the northern
[originaltext] Monarch butterflies are a common summer sight in the northern
游客
2024-04-26
31
管理
问题
Monarch butterflies are a common summer sight in the northern United States and Canada. These large orange and black insects brighten parks and gardens as they fly lightly among the flowers. What makes monarchs particularly interesting is that they migrate — all the way to California or Mexico and back. They are thought to be the only insect that does this.
Every year in the late summer monarchs begin their journey to the south. Those heading for Mexico go first for the Louisiana Mississippi area. They fly across the Gulf of Mexico into Texas. Once in Mexico, they settle themselves in one of about fifteen places in a mountain forest filled with fir trees. Each place provides a winter home for millions of monarchs. There are so many butterflies that they cover entire trees. When spring comes, they begin their long journey north.
The question is often asked whether every butterfly makes the round-trip journey every year. And the answer is no. The average monarch lives about nine months. So one flying north might lay eggs in Louisiana and then die. The eggs of that generation may be found in Kentucky: the eggs of the next generation may end up in Wisconsin or Michigan. The last generation of the season, about the fourth, will make their way back to Mexico and then restart the journey.
Scientists learn about monarchs’ migration by catching and making marks on the insects. By researching a monarch with such a mark and noticing where it came from, the next scientist can get to know things like the butterfly’s age and its routing.
Questions 23 to 25 are based on the passage you have just heard.
23. Which is one of the places where monarchs spend the winter?
24. How can the routing of monarchs’ migration be learned?
25. What does the passage mainly discuss?
选项
A、A plain in Texas.
B、A forest in Mexico.
C、The Gulf of Mexico.
D、An area in Mississippi.
答案
B
解析
根据短文中提到的Once in Mexico…in a mountain forest filled with fir trees.Each place provides a winter home for…monarchs可知,这些君主斑蝶将会在墨西哥的一个枞树林里过冬,故B)为答案。the winter是听音的关键。听到短文中的Mexico,forest,winter home等关键信息词可得出答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3572460.html
相关试题推荐
[originaltext]Monarchbutterfliesareacommonsummersightinthenorthern
[originaltext]Monarchbutterfliesareacommonsummersightinthenorthern
[originaltext]Monarchbutterfliesareacommonsummersightinthenorthern
[originaltext]MySpace,thesocialnetworkingwebsite,isdifferentfromoth
[originaltext]I’llstillbeworking,butthingswouldbedifferent.Withan
[originaltext]I’llstillbeworking,butthingswouldbedifferent.Withan
[originaltext]M:Whereareyougoing,Catherine?TodayisSaturday.W:Saturday
[originaltext]M:Whereareyougoing,Catherine?TodayisSaturday.W:Saturday
[originaltext]W:Whataday!I’mexhausted.M:Well,it’snotoveryet.W:Yeah
[originaltext]M:Iguesswe’llhaveahotsummeragain.W:Iknow.Lastsummer
随机试题
Googleisdevelopingahomeentertainmentdevice,accordingtopeoplewithk
[originaltext]M:Hello,Lucy.ThisisMac.Howareyou?W:Fine,thankyou.Ab
B2B电子商务发展经历了( )、基本电子商务、电子交易集市和协同商务四个阶段。
采用相反为制的原则炮制的药物是A.盐黄柏 B.萸黄连 C.麸炒枳实
以下不属于抗代谢抗肿瘤药的是A.甲氨蝶呤 B.阿糖胞苷 C.氟尿嘧啶 D.
徐某,女,外贸公司职员。工作期间,公司老板丁某经常对徐某实施性骚扰。根据 《妇
1996-141.下列哪组是治疗肾不纳气虚喘的药物 A.冬虫夏草、补骨脂B.
世界近代教育发展的重要成就之一是实施了A.补偿教育 B.义务教育 C.终身教
关于着色牙,以下说法不正确的是A.外源性着色牙一般采用常规口腔卫生清洁措施包括超
室外给水塑料管水压试验时,在试验压力下,稳压()压力降不大于(),然后降至工
最新回复
(
0
)