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
外语
A、Cud. B、Reticulum. C、Bacteria. D、Grass. C信息明示题。根据短文中Bacteria in cow’s stomachs aid in digesting the cellulose in stems of grass
A、Cud. B、Reticulum. C、Bacteria. D、Grass. C信息明示题。根据短文中Bacteria in cow’s stomachs aid in digesting the cellulose in stems of grass
admin
2014-11-27
27
问题
Cattle have served humanity since prehistoric days as beasts of burden and as suppliers of leather, meat, and milk. Some of the earliest written records concern the sale of cattle. These valuable animals are unusual in that they do not have front teeth in their upper jaw. Instead they chew with their rear teeth and gums. Cows swallow their food quickly and store it in the paunch or rumen, the first of the four compartments in their stomachs. Later the food passes into the second stomach or reticulum where it is rolled into little balls or cuds. While resting, cows cough up these cuds and chew them more thoroughly. This time the food passes into the third and then into the fourth stomach, where digestion takes place. Bacteria in cow’s stomachs aid in digesting the cellulose in stems of grass or hay.
Over one hundred million head of cattle are raised in the United States. Dairy cattle produce more than fifteen and one-half billion gallons of milk every year. Although dairy cattle are bred primarily to produce milk, about half the beef used in the United States comes from dairy breeds. This is because when dry(no longer producing milk)they fatten quickly and produce high-quality beef.
Questions 16 to 18 are based on the passage you have just heard.
16. According to the passage, what is the rumen?
17. What is the cow’ s second stomach used primarily for?
18. Which of the following is essential in the digestion of cellulose in the cow’ s stomach?
选项
A、Cud.
B、Reticulum.
C、Bacteria.
D、Grass.
答案
C
解析
信息明示题。根据短文中Bacteria in cow’s stomachs aid in digesting the cellulose in stems of grass or hay.可知牛胃里的细菌帮助消化纤维素。故正确答案为C。
转载请注明原文地址:https://kaotiyun.com/show/xlv7777K
0
大学英语四级
相关试题推荐
Humansaresocialanimals,andmostofustreasureourrelationshipswithfamilyandfriends.An【B1】_____lineofresearchsugges
A、Englishbeginners.B、Low-intermediateEnglishlearners.C、High-intermediateEnglishlearners.D、AdvancedEnglishlearners.D信息
Thinktwicenexttimewhensomeoneasksyoufor"fiveminutesofyourtime"—itcouldcostyoumorethanyouthink.ABritishpr
A、ReadingsomethingabouttheGreatWall.B、Takingavacation.C、VisitingtheSummerPalace.D、TeachingEnglish.D细节辨认题。女士问男士的暑假
Forthispart,youareallowed30minutestowriteashortessayentitledKnowledgeandDiploma.Youshouldwriteatleast120w
A、Hedoesn’tthinkitnecessarytorefuelthecar.B、Hethinksitisdifficulttogetfuelforthecar.C、Hehopesthewomanwil
A、Displayingyourexcitementaboutthejob.B、Expressingyourthankfulnesstothemanager.C、Showingyourqualificationforthe
A、Heisnotsureifheisontherightstreet.B、Hedoesnotbelievewhattheannouncersaid.C、Hefindstheyhavegottothewr
A、Changehismind.B、Goswimmingwithothers.C、Finishhisbookreport.D、Answerhisletters.B
A、Thereisheavytraffic.B、Shecannotfindtheplace.C、Thetrainarriveslate.D、Shehastowaitfortheman.C题干考查女士迟到的原因。对话中
随机试题
A、116B、156C、256D、356C第一行分别为0、1、2的平方,第二行分别为1、2、3的三次方,第三行分别为2、3、4的四次方,所以答案为44=(256)。
试述国际企业对其在某一东道国中从事经营活动的政治敏感度进行分析的主要内容。
要素饮食的适应证是()
A.麻痹性肠梗阻B.痉挛性肠梗阻C.绞窄性肠梗阻D.机械性肠梗阻E.单纯性肠梗阻外伤性腹膜后巨大血肿易发生()
在泥石流沟形态勘测中,当在弯道两岸都测得同一场泥石流的泥痕高度时,可用以确定或参与确定该场泥石流的()。
(2006年)矩形截面梁横力弯曲时,在横截面的中性轴处()。
某建筑承包工程的结算价款总额为1000万元,预付备料款占工程价款的20%,主要材料和结构件金额占工程价款的50%,每月实际完成工作量和合同价款调整增加额如下表所示。用按月结算和支付方式结算。经合同价调整后,此工程共计结算款为()万元。
中国特色对外开放的基本要求是
Nickisunusuallybright,sohisgreatsuccesshasbeen______.
Lookingback,itwasnaivetoexpectWikipedia’sjoyridetolastforever.Sinceitsinceptionin2001,theuser-writtenonlinee
最新回复
(
0
)