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
2023-08-25
38
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、By comparing their different ages.
B、By counting the dead ones in the forests.
C、By examining the marks made on them.
D、By collecting their eggs in the mountains.
答案
C
解析
选项均以“By+现在分词”开头表明,本题可能考查做某事的方式。根据文中提到的Scientists learn about monarchs’migration by…making marks on the insects可知,科学家通过在这些昆虫身上做标记来了解它们的迁徙路线,故答案为C)。monarchs’migration是听音关键。C)中的marks made on them对应making marks on the insects。
转载请注明原文地址:https://tihaiku.com/zcyy/2956197.html
相关试题推荐
[originaltext]Today,roller-skatingiseasyandfun.Butalongtimeago,i
[originaltext]Today,roller-skatingiseasyandfun.Butalongtimeago,i
[originaltext]Today,roller-skatingiseasyandfun.Butalongtimeago,i
[originaltext]M:[22]Dr.Cole,thankyouforagreeingtothisinterviewforthe
[originaltext]M:[22]Dr.Cole,thankyouforagreeingtothisinterviewforthe
[originaltext]W:I’vebeenreadingaboutanewhealthfulsnackfood.It’smade
[originaltext]M:Lucy,couldyoudescribewhatyouweredoingatthemoment?W:
[originaltext]M:Lucy,couldyoudescribewhatyouweredoingatthemoment?W:
[originaltext]M:Lucy,couldyoudescribewhatyouweredoingatthemoment?W:
[originaltext]AlotofpeoplearefamiliarwiththestoryofBraveGelert,
随机试题
PASSAGETHREE[br]Whatisthepassagemainlyabout?Thedevelopmentoflanguage
Inthedevelopedcountries,thedominantfactorinthenextsocietywillbe
[originaltext]M:I’mlookingforanunfurnishedtwo-bedroomapartment.Butall
某钢结构工程起重吊装作业前,需编制()用以指导吊装作业。A.施工组织总设计 B
为用户提供远程登陆功能的协议是(),其访问端口默认为()。A.21
等渗性脱水时应补充()。A. B.等量5%葡萄糖水及0.9%生理盐水 C.
请阅读Passage2,完成第小题。 Passage2 AmongCh
证券公司分类监管评价首先设定正常经营的证券公司基准分为()分。A.100
小张,大学毕业后赴英国留学,因对语言、风俗习惯、价值观等不适产生压力。其压力来源
(2015年真题)根据我国现行建筑安装工程费用项目组成的规定,下列关于措施项目费
最新回复
(
0
)