首页
登录
职称英语
[originaltext] Cattle have served humanity since prehistoric days as beasts o
[originaltext] Cattle have served humanity since prehistoric days as beasts o
游客
2023-06-27
78
管理
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、The first stomach compartment.
B、The name of the upper jaw.
C、The stomach where digestion takes place.
D、The name of the bacteria in the cow’s stomach.
答案
A
解析
信息明示题。短文中指出the paunch or rumen,the first of the four compartments in their stomachs。故可知rumen是牛四个胃中的第一个。所以选A。
转载请注明原文地址:https://tihaiku.com/zcyy/2786799.html
相关试题推荐
[originaltext]Mr.MiyazakiisthefirstevermalelawmakerinJapantorequ
[originaltext]Areelectriccarsthewayofthefuture?Automobilemanufactu
[originaltext]Areelectriccarsthewayofthefuture?Automobilemanufactu
[originaltext]EverycultureandeverycountryintheworldcelebratestheN
[originaltext]EverycultureandeverycountryintheworldcelebratestheN
[originaltext]EverycultureandeverycountryintheworldcelebratestheN
[originaltext]W:Hey!Yougotanewtelevision.M:Yeah!Itwasdeliveredyeste
[originaltext]W:Hey!Yougotanewtelevision.M:Yeah!Itwasdeliveredyeste
[originaltext]W:Hey!Yougotanewtelevision.M:Yeah!Itwasdeliveredyeste
[originaltext]M:Goodmorning.You’reMs.Clay,right?Dositdown,please.Now
随机试题
Googlemustbethemostambitiouscompanyintheworld.Itsstatedgoal,"to
Internationaltradefairshavebecomeextremelyimportantvenuesforconduct
正常脑脊液中的主要蛋白质是A.纤维蛋白原 B.球蛋白 C.清蛋白 D.β微
特殊巡视端子箱及检修电源箱正确的是()(A)气温升高后,检查箱体内驱潮加热装置
从上述资料中,能推出的是: A地理环境的差异是小康实现程度差异的原因 B
如果一个人同时戴两块手表,可能会觉得不,因为他不知道该相信哪一块手
影响农产品销售渠道选择的基本因素有( )。 A.商品的自然属性 B.
(2017年真题)为了掌握市场信息,有效安排生产运营,某糖果生产企业进行了市场调
(2014年)根据《环境影响评价技术导则—声环境》,下列关于声环境影响预测点确定
下列经济业务中,不应填制付款凭证的是()。A:从银行提取现金B:购买材料未付款
最新回复
(
0
)