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
Suppose you lost a lot of blood, what would a doctor do? Replace the blood as quickly as possible by giving you a transfusion of
Suppose you lost a lot of blood, what would a doctor do? Replace the blood as quickly as possible by giving you a transfusion of
admin
2009-06-24
51
问题
Suppose you lost a lot of blood, what would a doctor do? Replace the blood as quickly as possible by giving you a transfusion of blood donated by another person. But the doctor can’t use just anyone’s blood. The donor’s blood has to be of a type that won’t be destroyed by your blood. Blood type? What’s that?
To find your blood type, the doctor sends your blood to a laboratory. There your red cells are separated from the other parts of your blood. These ceils may have certain antigens (special proteins) on their surfaces—"A" antigens and/or "B" antigens. If your red ceils have "A" antigens you are Type A; "B" antigens make you Type B; both "A" and "B" make you Type AB; neither "A" nor "B’ antigens makes you Type O. How do you find these antigens?
A lab technician mixes your red blood cells with two kinds of blood serum. One contains anti-A antibodies. The other kind contains anti-B antibodies. An antibody is a substance that "attacks" a particular antigen, in this case "A" or "B" antigens.
The technician then looks at each mixture under a microscope to see what will happen to your red blood cells. Certain mixtures may make your red cells clump together. By finding which mixtures do this and which do not, the technician can figure out your blood type.
But blood typing isn’t the only reason to have a blood test taken. It can also check for signs of infection. How? When you have an infection, especially a serious one, the number of white blood cells soars. This is normal response of your body to an invasion of germs.
This time a sample of blood goes to the lab for a CBC—complete blood count. A technician will examine your blood under a microscope—counting the white cells in a small marked-off area If the number is much higher than it ought to be, the doctor may need to treat you to be sure the infection doesn’t spread.
Other blood tests can determine the concentration of various chemicals in your blood or the variety and types of blood cells circulating in the blood. The information hidden in a drop of blood may lead a doctor to suggest ways to treat, or avoid dangerous health conditions.
Was the stick in the finger or arm necessary? If protecting yourself from danger is necessary, the answer has got to be...yes!
选项
A、discussing the blood testing and its use of determining blood group and checking for infection
B、differentiating the four blood types
C、the technique and procedure of blood testing
D、illustrating various types of blood
答案
A
解析
主旨题。通读全文,发现文章介绍了各种不同的血型,以及血型分类的意义和作用。
转载请注明原文地址:https://jikaoti.com/ti/HASsFFFM
本试题收录于:
公共英语五级笔试题库公共英语(PETS)分类
0
公共英语五级笔试
公共英语(PETS)
相关试题推荐
TheStoryteller1StevenSpielberghasalwayshadonegoal:totellasmanyinterestingstoriestoasmanypeopleaspossibl
HeatIsKillerExtremelyhotweatheriscommoninmanypartsoftheworld.Althoughhotweatherjustmakesmostpeoplefeel
TeachingIs"OneoftheLeastPopularJobsintheUK"1.TheUKgovernmenthasjustpublishedareportonthefutureofsecon
A.alotofmoneyB.BritishpeopleC.morningD.localpeopleE.nationalissuesF.localissuesManylocalnewspapersinBritainar
SendingE-mailstoProfessorsOnestudentskippedclassandthensenttheprofessorane-mail(51)forcopiesofherteaching
ShrinkingWaterSupplyPosesThreattoPeace"Water,whichisessentialforlife,costsnothing.Ontheotherhand,diamonds,wh
Japanhasalongtradingtradition.ChinadidnottakeIMFadvice.
Economicgrowthindevelopingnationsdependsmoreontheability,todesigneffectivemarketingsystemsthanthedevelopednati
Answerquestionsbyreferringtothedescriptionsofthreewine-producingregionsinFrance.Note:Whenmorethanoneanswer
Dr.WhiteandMr.Lihavenotmetbefore.
随机试题
在Na2CO3水溶液中,加入下列物质,能起反应且看不出现象的是()。
下述哪一部位不是淋病的好发部位
绘制双代号网络图的步骤包括()。
水泥混合料铺筑前,应对()等设施项目进行检查。
抗震设防在()时,蓄电池组必须用钢抗震框架或柜架安装。
张某与李某同住一省,张某居住在B县,李某居住在C县。张某因侵权责任对李某提起民事诉讼,应由( )管辖。
首个总部落户于中国北京的国际性旅游组织是()。
Datahasahabitofspreading.ItslipspastmilitarysecurityanditcanalsoleakfromWikiLeaks.Itevenslippedpasttheban
下列Applet实现了在Applet窗口中绘制一个以(70,70)为圆心,50为半径,边框为绿色的圆,圆心是红色的。选择正确的语句填入下面横线处。importjava.awt.*;importjava.applet.*;
Itisnoteasytoremaintranquilwheneventssuddenlychangeyourlife.
最新回复
(
0
)