关闭图标
log图标

toefl.viplgw.cn

  • 使用手机注册
  • 使用邮箱注册
  • 手机号不能为空!

    验证码不能为空!

    用户名不能为空!

    密码不能为空!

  • 邮箱不能为空!

    验证码不能为空!

    用户名不能为空!

    密码不能为空!

已有账号? 登录到雷哥托福
关闭图标
log图标
  • 使用手机找回密码
  • 使用邮箱找回密码
  • 手机号不能为空!

    验证码不能为空!

    密码不能为空!

  • 邮箱不能为空!

    验证码不能为空!

    密码不能为空!

又想起来了
加入生词本

listen

英['lɪs(ə)n] 美['lɪsn]
vi. 听,倾听;听从,听信
n. 听,倾听

已添加
×

我要举报草莓小菇凉评论

用户头像
草莓小菇凉:说的非常好,十分有道理,棒棒棒!

06-08 15:44:55

请选择举报类型:

举报电话:400 1816 180    举报QQ:2095453331
×
logo图标
分享到雷哥托福

分享成功图标分享成功

邀请名师点评成功,管理员正在安排老师进行点评。

继续做题 返回首页
支付雷豆失败图标 雷豆余额不足 购买雷豆 返回
报告题目错误
请选择错误类型:
请描述一下这个错误:

取消

文章结构

Official 49-L3 .Squirrel's ability 点击收藏

标准

  • 高音
  • 静音
  • 句子
    精听
  • 全文
    精听
  • 听写
    模式
  • 点击查看本句

    听写本句 再播一遍 下一句
  • 点击查看全文

    再播一遍本文

    Listen to part of a lecture in a biology class.

    Okay,so that's how the arctic ground squirrel's able to cope in this extreme environment.

    Now let's talk about your reading assignment,about reindeer,also typically found in Siberia and other far northern regions.

    Who would like to start off?Yes,Mike?

    Well,for one thing,they've got thick hair all over their body,even on their noses.

    Yes.They are very well insulated,and the thickness of their fur varies depending on the season.

    Good.Yes?

    Um...newborn reindeer are very adult-like,like they can stand as soon as they're born,

    and by their second day they can already run as fast as a human.

    Critical.Food is very scarce in far north so reindeer herds have to cover lots of ground every day.

    And in the fall they might easily trek a thousand kilometers or more to get to their winter feeding site.

    So if you are a newborn you've got to get up to speed fast.

    Okay Other adaptations?

    Also reindeer don't have to keep their legs as warm as their main body,so they don't have to use up as much energy keeping them warm.

    Yes,so that means they can allocate less energy to heating their extremities and more energy to maintaining stable temperature in their body core where their vital organs are located.

    And you know I don't think it is mentioned in your textbook,

    but even different parts of a reindeers leg are adapted for optimal cold weather performance.

    The fat in the lower part of their legs,the part that gets coldest,that fat has a different chemical structure from the fat in the upper parts of the leg.

    So it doesn't get hard,even at temperatures down around freezing,it stays kind of gel-like,kind of oily.

    Okay, good.What about food?

    What do you remember about that?

    Well,they are pretty flexible.

    OK,can you explain that a little more?

    Well,they can eat a lot of different kinds of plants,so that improves their chances of coming across something they can eat.

    I think they said that they found that the reindeer in one herd had something like 37 different kinds of plants.

    OK,yes.You've really done your reading.

    And reindeer also eat a number of different plant species that most animals are not very interested in.

    Which means?

    They don't have a lot of competition when it comes to that food?

    That's right.

    In particular,your reading mentions lichens.

    Lichens are plants you'll find growing on rocks in the far north,sometimes referred to as reindeer moss.

    They look pretty basic you know,just a little moss on a rock.

    But lichens are actually quite complex.

    They are not just a single organism.

    They're actually kind of combination of some sort of fungus and some sort of algae that lire together in a symbiotic relationship.

    Anyway...Okay,reindeer,um,oh,oh yes,and one more thing about lichens.

    They crank out a lot of chemicals,which is probably at least part of the reason why they are not considered all that tasty by most animals.

    Anyway,does anyone remember what your reading said about them?

    Yeah,somehow when reindeer eat lichens they're able to draw a lot more nutrients from them than other animals.

    Like if a cow or a sheep eats lichens,they're only gonna get like half as much nutrition out af them as a reindeer would.

    That's right,and in winter,lichens are crucial for reindeer because their supply energy,

    but they don't have all the proteins and minerals the reindeer need.

    Um,so when reindeer get to the end of the long winter they are often very thin with low levels of minerals.

    In spring they have to eat different plants and replenish what they've lost over the winter,

    so what reindeer have done is they've developed the ability to digest different plants in different seasons by adjusting the microbes in their digestive systems.

    As you know microbes are micro-organisms like bacteria that help to digest or break down food.

    • special
    ☞查看答案 再播一遍

联系雷哥托福

全国免费咨询热线:400 1816 180

  • 上海(总部)
  • 北京
  • 成都
  • 杭州
  • 武汉
  • 南京
  • 广州
  • 西安
  • 重庆
  • 深圳
  • 上海(总部)服务中心

    电话:400 1816 180

    地址:上海市徐汇区文定路218号德必徐家汇WE艺术湾B座205

    公交路线:76路、93路、138路宜山路蒲汇塘路站;205路、732路、754路南丹路宜山路站;205路、754路、830路南丹路文定路站等

    地铁路线:地铁3号线、4号线宜山路站出站470m;地铁1号线、4号线上海体育馆站出站600m。

  • 北京服务中心

    电话:400 1816 180

    地址:北京市朝阳区雅宝路7号 E园EPARK大厦508

    公交路线:乘坐公交44路外环;58路;139路;特12路外环;特2路;夜20路外环到雅宝路公交站 下车,走140米即可达到。

    地铁路线:乘坐地铁1号线、2号线到建国门站(A出口)步行1000米即可到达;乘坐地铁2号线、6号线到朝阳门站(A出口)步行1200米即可到达雅宝路7号 E园EPARK大厦。

  • 成都服务中心

    电话:400 1816 180

    地址:成都市锦江区总府路31号Z31六楼(皇冠假日酒店旁)

    公交路线:乘坐58路、98路、锦城观光3号线、熊猫快线5号线在春熙路步行街北站下 步行约281米。

    地铁路线:乘坐地铁2号线或者3号线到春熙路C口下,步行约982米

  • 杭州服务中心

    电话:400 1816 180

    地址:杭州市江干区江锦路159号 平安金融中心B座8楼

    公交路线:901路、105路环线、106路环线、9M路:富春路民心路口站 176路:市民中心北大门站,市民中心西大门站

    地铁路线:号线钱江路站;4号线钱江路,江锦路

  • 武汉服务中心

    电话:400 1816 180

    地址:武汉市珞瑜路光谷世界城广场写字楼1栋1单元14层11421室

    公交路线:乘坐18路,25路,340路,510路,518路,521路等公交车到珞瑜路湖北省中医院站下车

    地铁路线:乘坐地铁2号线至珞雄路A口出,往湖北省中医院光谷院区方向步行50米至世界城广场写字楼

  • 南京服务中心

    电话:400 1816 180

    地址: 南京市秦淮区中山东路532号金蝶科技园 H1幢308号(林客社 内)

    公交路线:5路 34路 34路区间 36路 55路 59路 y5路夜间 17路 65路 115路 118路 y17路夜间

    地铁路线:地铁2号线明故宫站1号口出,向东200米

  • 广州服务中心

    电话:400 1816 180

    地址:广州市天河区体育西路103号维多利广场B座26楼K15

    公交路线:11,18,20,230,278,293,45,583,669,886冼村路中站下。 194,40,777,778,90,观光2路花城广场路站下。

    地铁路线:乘坐地铁APM线至花城大道站下B口出,步行约500米即可到达保利威座大厦北塔。

  • 西安服务中心

    电话:400 1816 180

    地址:西安市莲湖区北大街西华门十字西南角78号嘉会广场C座4层B021号

    公交路线:4路、12路、26路、36路、37路、229路、游7钟楼北站;15路、16路、32路、102路、182路、236路、286路西华门站。

    地铁路线:地铁二号线钟楼站150米;地铁一号线/二号线北大街站700米。

  • 重庆服务中心

    电话:400 1816 180

    地址:重庆市渝中区邹容路68号大都会广场16楼1603-1604室

    公交路线:401、135、114、111、401、151、862、181、262、105、866、153、466

    地铁路线:2号线临江门站500米、1号线小什字站500米、6号线小什字站500米。

  • 深圳服务中心

    电话:400 1816 180

    地址:深圳市罗湖区书城路都市名园B栋5楼B区(只接受预约拜访)

    公交路线:101路 10路 12路 203路 214路 215路 223路 29路 3路 85路 M112路 M191路 M192路 N3路 P100路(定制公交请预约) 高快巴士200号线 高快巴士20路 高快巴士863号线到地王大厦下,步行431米即可到达。

    地铁路线:乘坐1号线/罗宝线/2号线/蛇口线到大剧院(E口)出,步行498米即可到达都市名园B栋

预约托福考试规划师