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
2024-01-30
37
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/3406761.html
相关试题推荐
[originaltext]W:Didn’tyouwriteapaperaboutAlbertKahnlastsemester?M:Y
[originaltext]W:[8]Areyougoingtofindajobagainthissummer?M:[8]Yes,o
[originaltext]W:[8]Areyougoingtofindajobagainthissummer?M:[8]Yes,o
[originaltext][5]/[6]FourgunmenhavebeenkilledastheIndianmilitaryhi
[originaltext][3]OPEChasdecidedthiswasnotthetimeforcuttingpetrol
[originaltext]AcourtintheUnitedStateshasruledthatthehamburgercha
[originaltext]AcourtintheUnitedStateshasruledthatthehamburgercha
[originaltext]W:ThereisnewdataouttodaythatconfirmsthatmanyAmericans
[originaltext]W:ThereisnewdataouttodaythatconfirmsthatmanyAmericans
[originaltext]M:Hi,Susan.Youarelookingverysmarttoday.W:Ialwayslook
随机试题
HemustgiveUSmoretime,______weshallnotbeabletomakeagoodjobofit.A、
Whenyouhavetomeetsomeonefromadifferentculture,beprepared.Ifyou
Forthispart,youareallowed30minutestowritealetterofcomplaintonthe
栽培以茎叶为收获对象的叶菜类作物时,可适当多施( )。A.磷肥 B.氮肥
目前,我国已制定了包括水污染防治、海洋环境保护、大气污染防治、环境噪声污染防治、
《传染病防治法》规定,传染病暴发、流行时,当地政府应当A、限制或停止集市、集会
对于原地基处理的要求的说法正确的有()。A.二级及二级以上公路路堤和填方高度小
关于建筑地面工程施工时对环境温度控制要求的说法,正确的是()。A、采用掺有水泥、
下列关于施工建设阶段的说法错误的是()A.配合设备安装、确保安装质量属于介入的内
绩效考核是对客观行为及其结果的主观评价,容易出现误差,导致误差的原因有()。
最新回复
(
0
)