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
2017-02-24
26
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/Lti7777K
0
大学英语四级
相关试题推荐
A、5:15.B、5:10.C、4:30.D、5:00.C关键在于听到女士说的“Sue的丈夫说她是4:30离开家的”。因此选C。
Sportsandgamesmakeourbodiesstrong,【B1】______gettingtoofat,andkeepushealthy.Butthesearenottheironlyuse.They
Sportsandgamesmakeourbodiesstrong,【B1】______gettingtoofat,andkeepushealthy.Butthesearenottheironlyuse.They
ForAmericans,timeismoney.Theysay,"Youonlygetsomuchtimeinthislife;you’dbetteruseitwisely."Thefuturewillno
ForAmericans,timeismoney.Theysay,"Youonlygetsomuchtimeinthislife;you’dbetteruseitwisely."Thefuturewillno
传统中国绘画是一门独特的艺术,无论是风格还是技巧都是与世界其他艺术门类迥然不同的。中国画的一个特点是强调绘画的宣传功能。早在两千多年前,人物画就被政府机构广泛用作宣传工作。唐代的士大夫们(officials)甚至试图把绘画创作纳入儒家的思想体系中。到了宋代
A、Itismorespecialthanothers.B、Itischeaperthanusual.C、Itis80%oftheregularprice.D、Itisonsaleonlyfortoday.
InAmericatherearenumeroustypesofdoctors,fromgeneralpractitioners(从业者)tospecialists.MostpeopleintheU.S.havea"p
A、Theydon’tknowaboutthebenefitsoftheresearch.B、Theresearchgoesagainsttheirreligiousbeliefs.C、Theresearchcosts
A、Sleepingproblems.B、Stomachproblems.C、Bademotions.D、Highbloodpressure.B短文提到,长期过量喝咖啡会导致胃部和牙齿出现问题。B对应其中一个负面影响,故正确。
随机试题
A.胃脘下俞B.十七椎C.定喘D.胆囊治疗消渴的穴位为
【背景资料】某机电公司承接一地铁机电工程,工程范围包括通风与空调、给水排水及消防水、动力照明、环境与设备监控系统等。工程各站设置2台制冷机组,单台机组重量为5t,位于地下站台层。各站两端的新风及排风竖井共安装5台大型风机。空调冷冻、冷却水管采用镀锌钢管
某传染病病室,长5m、宽4m、高4m,用福尔马林进行室内消毒,福尔马林用量是
自身免疫病治疗原则中属于免疫抑制的方法是
患者,男性,8岁。不慎溺水,心跳、呼吸消失,最首要的处理措施为
根据我国现行规定,直接计入所有者权益的利得和损失包括()。
下列属于建筑安装工程直接工程费中材料费的有()。
群岛一般指集合的岛屿群体,是彼此距离很近的许多岛屿的合称,一般分布在大陆的边缘较浅海地区,是人类重要的生活区域。群岛气候一般带有明显的海洋特点。渔业资源也相对丰富。以下不属于我国四大群岛的是()。
有以下程序#include<stdio.h>main(){charb[4][10];inti;for(i=0;i<4;i++)scanf("%s",b[i]);printf("%s%s%s%s
Telecommunicationsisjustoneofthemeansbywhichpeoplecommunicateand,assuch,weneedtolookattelecommunicationsand
最新回复
(
0
)