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、Food storage. B、The production of milk. C、Digestion. D、The creation of cuds. D信息明示题。短文中指出Later the food passes into the second
A、Food storage. B、The production of milk. C、Digestion. D、The creation of cuds. D信息明示题。短文中指出Later the food passes into the second
admin
2017-02-24
42
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、Food storage.
B、The production of milk.
C、Digestion.
D、The creation of cuds.
答案
D
解析
信息明示题。短文中指出Later the food passes into the second stomach or reticulum where it is rolled into little balls or cuds.故可知第二个胃用来形成反刍的食物。故选D。
转载请注明原文地址:https://jikaoti.com/ti/yzjFFFFM
0
大学英语四级
相关试题推荐
There’snothingliketheinstinctiveroarofthecrowdwhenthousandsofpeopleallsing,orshouttogether.Buttranslatingtha
There’snothingliketheinstinctiveroarofthecrowdwhenthousandsofpeopleallsing,orshouttogether.Buttranslatingtha
Around120yearsago,Ebbinghausbeganhisstudyofmemory.He【B1】______studyinghowquicklythehumanmindcanrememberinform
A、Customerandassistant.B、Fatheranddaughter.C、Dentistandpatient.D、Teacherandstudent.C由关键词teeth和examining可知正确答案为C(牙医和病
A、Sixyears.B、Fouryears.C、Threeyears.D、Oneyear.B男士6年前第一次来到这里,一年后搬走,3年前又搬来,因此该男士在这里一共住了1+3=4年,选B。本题难点不在猜题,而在于把听到的内容标记清楚,再根
A、Thebusstation.B、Theschool.C、Theairport.D、Thetravelagency.C女士说:“我想你最好乘坐机场快线。”机场快线是连接机场与市中心的专用交通,因此男士应该是去机场,选C。解题关键是听懂
A、Friends.B、Bossandsecretary.C、Customerandcashier.D、Colleagues.C该对话关键特征词为foreigncurrency(外汇),cash,ortravel’schecks(现金
A、Teacherandstudent.B、Doctorandpatient.C、Managerandofficeworker.D、Travelagentandcustomer.C关键是要听到女士说要“休假”,而男士要求她“填写
Ifthesalinity(含盐量)ofoceanwatersisanalyzed,itisfoundtovaryonlyslightlyfromplacetoplace.Nevertheless,someof
A、Thereisseldomanyfriendshipintheworkplace.B、Peoplewanttobetreatedwithspecialprivileges.C、Peoplearesofterwith
随机试题
纤维结肠镜检后,有以下哪些情况提示肠穿孔
护理学是
哺乳期发生的乳痈称非怀孕期发生的乳痈称
关于普罗布考的降血脂作用,叙述正确的是
某药品生产企业的销售员张某携带生产企业出具的在B县销售的授权委托书,一路以流动的形式销售药品,在A县将药品销售给药品经营公司,该经营公司购进药品时也未查验张某的委托授权书等证件。本案件的违法主体是()。
下列资产项目中,流动性最强的是()。
拟建设一个光通信骨干网络连通BJ、CS、XA、QD、JN、NJ、TL和WH等8个城市,图中无向边上的权值表示两个城市间备选光纤的铺设费用。请回答下列问题。假设每个城市采用一个路由器按计算总费用中得到的最经济方案组网,主机H1直接连接在TL的路由器上
A.分布于下颌1~4唇颊侧牙龈,下唇黏膜B.分布于下颌1~8及其牙周膜,牙槽骨C.分布于下颌1~8舌侧牙龈、口底及舌前2/3的黏膜、舌下腺D.分布于上颌45及上颌6的近中颊根,牙周膜,牙槽骨及颊侧牙龈E.分布于上颌78及上颌6的腭根,远中颊根,牙周
Populationageingandtheresultingpressuresonexistingpensionsystemsconstitutesoneofthemostimportantchallengesmode
Themotorvehiclehaskilledanddisabledmorepeopleinitsbriefhistorythananybomborweaponeverinvented.Muchofthebl
最新回复
(
0
)