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
1.Leukemia is a kind of cancer in which abnormal white blood cells grow in an uncontrolled manner. These abnormal cells interfer
1.Leukemia is a kind of cancer in which abnormal white blood cells grow in an uncontrolled manner. These abnormal cells interfer
admin
2011-01-06
87
问题
1.Leukemia is a kind of cancer in which abnormal white blood cells grow in an uncontrolled manner. These abnormal cells interfere with the production of normal white blood cells, which fight infection. Leukemia is a disease of the bone marrow and other blood-forming organs. Consequently, leukemia also affects the production of red blood cells, which carry oxygen from the lungs throughout the body, and platelets, blood cells that help stop bleeding. Signs of leukemia include repeated infection, anemia, and frequent bleeding.
2. The cause of most human leukemia is unknown. Researchers have discovered a leukemia virus in cats, and they have identified a virus that appears to cause a rare type of leukemia in people. Other possible causes include exposure to radiation and harmful chemicals.
3. Doctors classify leukemia according to the type of white blood cell affected. Two of the main blood cell types affected by. leukemia are myeloid and lymphoid. Myeloid cells fight bacterial infections. Lymphoid cells detect and respond to the presence of foreign substances in the body. All kinds of leukemia can be either acute of chronic.
4. Acute leukemias often develop suddenly. Abnormal, immature white blood cells multiply rapidly, and the number of normal cells decreases sharply. Acute myeloid leukemia most often occurs among adults. The treatment for this leukemia is chemotherapy, the use of chemicals that are more toxic to cancer cells than to normal cells. Seventy percent of patients enter remission. During remission, the blood cells and the bone marrow temporarily return to normal. Researchers are trying to develop methods of prolonging remission in acute myeloid leukemia patients. The treatment of acute leukemias is intensive and may endanger the patient’s life. The use of powerful antibiotics and of blood transfusions has increased the chances of surviving the intensive therapy.
5. Chronic leukemias develop more slowly than acute leukemias. In chronic leukemias, the abnormal white blood cells appear mature, and they resemble normal white blood cells. In the early stages of the disease, these abnormal cells even function normally to some extent. Chronic lymphocytic leukemia is the most common leukemia among adults. The average age of people suffering from this disease is the early 70’s. The disease may take as long as 10 years to develop completely. Chronic myeloid leukemia is a less common form of leukemia that occurs primarily among adults. Doctors generally use drugs to treat chronic leukemia patients.
A. Leukemia is a very serious disease
B. Myeloid cells differ from lymphoid cells in that myeloid cells combat bacteria infections
C. Acute eukemia comes more speedily to a crisis than does chronic leukemia
D. Several ways are available to prolong remission in acute myeloid leukemia patients
E. Researchers have discovered that leukemia may be caused by invasion of viruses, exposure to radiation, or contact with harmful chemicals
F. In chronic leukemia, the abnormal white blood cells not only resemble normal white blood cells but function normally to some extent in the early stages of the disease
Paragraph 2 ______.
选项
答案
E
解析
第二段的段意为“研究人员发现了可能造成人类某种白血病的原因是病毒,其他原因也包括辐射和有害的化学物质。”
转载请注明原文地址:https://kaotiyun.com/show/azmd777K
本试题收录于:
职称英语卫生类B级题库职称英语分类
0
职称英语卫生类B级
职称英语
相关试题推荐
Inthelate1960’s,manypeopleinNorthAmericaturnedtheirattentiontoenvironmentalproblems,andnewsteel-and-glassskysc
TheplaceisalovelymeadowsurroundedbydeepwoodsonahilltopoverlookingabeautifullakeintheCatskillMountains120mi
Readthefollowingarticleandchoosethebestwordforeachspace.Forquestions26-45,markoneletterA,B,CorDonyou
Readthefollowingarticleandchoosethebestwordforeachspace.Forquestions26-45,markoneletterA,B,CorDonyou
MoniquehasbeeninLondonfor【L5】______days.MoniqueistakingtheEnglishcoursetoimproveher【L6】______Englishandtosee【L7
Youwillhearfivepeoplegivingreasonswhychildrenlearntheirmothertonguesowell.Beforeyoulisten,readthelistof
Writeacardtosendtoyourfriend,Inyourcard,youshould•inviteyourfriendtotheparty•saywhenitwilltakeplace•
ScreenTest1.EveryyearmillionsofwomenarescreenedwithX-raystopickupsignsofbreastcancer.Ifthishappensearlyen
Hereyoucanseethefoodcompactlystoredinapressurizedtank.
ANewfindingabouttheupperatmosphereBStratosphereCIonosphereDThecompositionofthepermanentgasesintheatmosph
随机试题
Theexperimentwas______beingafailure;itwasagreatsuccess.
怀疑霍乱弧菌感染的粪便应该接种于何种培养基中增菌
红光中学与周到服装厂签订一份合同。由周到服装厂为红光中学加工1000套初一学生校服。因材料提供、式样更改、服装厂债权纠纷等问题,引起纠纷。如该批校服是由周到服装厂自备面料加工,在1000套校服交付红光中学之前,下列表述正确的是:()
关于政府采购项目中的废标,下列说法中正确的是()。
(2008)下列围护结构,哪种热惰性指标最小?
应纳印花税的凭证应当于()贴花。
进货检验的形式通常有________。
根据我国现行宪法,有权改变或撤销地方各级国家行政机关不适当的决定和命令的国家机关是()
软件需求规格说明书的作用不包括
A、Efficiencyofgovernment.B、Environmentalprotection.C、Decentralization.D、Trafficconcerns.C根据题干要求找寻到有关韩国总统的说法,发现原文第三段“hes
最新回复
(
0
)