首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
财务会计
共用题干 Beyond the PapScientists have know
共用题干 Beyond the PapScientists have know
天天题库
2019-12-17
12
问题
共用题干Beyond the Pap
Scientists have known for some time that virtually all cases of cervical cancer are triggered by a family of viruses called human papillomavirus,or HPV.Most women who become infected with HPV are able to shake off the virus and suffer no apparent long-term consequences to their health.But a few women develop a per- sistent infection that can,for reasons that are not entirely clear,eventually lead to cancerous changes in the cervix。
Now researchers at the Digene Corp.of Beltsville,Maryland,have developed a test that detects an ac- tive HPV infection by looking for its genetic byproducts in the vagina.The HPV test was better than the standard Pap test at finding cervical cancer at any stage,according to two studies published this month in the Journal of the American Medical Association.So far,so good.Unfortunately,the test's false-positive rate- how often it indicated that there was a problem when none existed-was almost twice as high as that for the Pap smear.In these cases,a biopsy of the woman's cervix showed no sign of disease.
And that's the crux of the problem.How many women should undergo what is,when it comes right down to it,unnecessary treatment to find a few more cases of cervical cancer? Shouldn't health officials fodus instead on making sure that more women undergo regular Papsmear examinations?After all,Pap smears,though far from perfect,have helped dramatically lower the death toll from cervical cancer,taking it from the No.1 cause of death due to cancer in American women to the 10th.
Complicating matters is the fact that HPV is a very common infection.In some parts of the US as many as half of all women under age 35 have an active case.Yet 99 out of 100 women who are HPV-positive will never get cervical cancer,estimates Dr.Joanna Cain,vice president of the American College of Obstetricians and Gynecologists."If those 99 women live their lives as if they're going to develop cancer,"she says, "we're not necessarily doing them any good."
At present,the HPV test is approved in the US only to help resolve ambiguous results from a Papsmear test.Many gynecologists believe that HPV will eventually replace the Pap.But they're not willing to aban don it without a lot more detailed information and neither should you.
选项
The cause of cervical cancer was discovered by American scientists some time ago.A:Right B:Wrong C:Not mentioned
答案
C
解析
文章第一段第一句中提到,一段时间以来,科学家们已经知道几乎所有的子宫颈癌病例都是由一组名为人类乳头状瘤病毒或HPV的病毒引起的,但题干中所陈述的一段时间以前美国科学家发现了引发子宫颈癌的原因在文章中并未提及。故本题选C。 由文章第一段最后一句话可知,只有少数妇女会在长期感染这种病毒后发生宫颈癌变。题干内容与之相符,故选A。 文章第二段前半部分内容主要描述了人类乳头状瘤病毒检测方法的优势。但在第四句中提到,这种试验的假阳性率是巴氏涂片试验假阳性率的两倍,故选B。 由文章第三段最后一句的内容可知,虽然巴氏涂片试验还远未完善,但却为减少因子宫颈癌而死亡的人数起到了巨大的帮助作用。题干的内容和此处含义相符,故选A。 由文章第三段最后一句中的“… taking it from the No.1 cause of death due to … to the 10th.”可知,子宫颈癌是危害美国女性生命和健康的头号杀手,题干的内容表述正确,故选A。 文章第四段中提到,99%的人类乳头状瘤病毒阳性的妇女都不会患子宫颈癌。如果医务工作者使这些女性惶惶不安,整日担心会患上癌症,这将会给她们带来不良影响。故本题选A。 文章最后一段第二句中提到,很多妇科专家都相信人类乳头状瘤病毒试验终将取代巴氏涂片试验。但作者在此处只是客观陈述,并未表达自己的观点。故本题选C。
转载请注明原文地址:https://ti.zuoweng.com/ti/hcOfKKKQ
相关试题推荐
A题干由三种字母组成,其组合形式是AABBACCA,只有A项符合。
B题干图形均代表一项运动,B符合。
C大小形状相同的图形看作一类图形,题干图形都由两类图形组成,选项中只有C符合。
B题干图形包含的交点数依次为5、4、3、2、1、(0),只有B符合。
A.4 B.8 C.3√2 D.4√2A题干数列是公比为√2的等比数列。
D根据题干第二个图形的结构,可排除A、B、C,如图所示:
C题干四个图形中都含有一条长度相等的水平或竖直线,由此选择C,如图所示:
A题干符号规律为ABCABD,只有A项符合此规律。故答案选A。
C题干符号规律为ABCDABCEF,只有C项符合此规律。故答案选C。
(―)每道题在上边的题干中给出一套图形,其中有五个图,这五个图呈现一定的规律性。
随机试题
关于施工控制网的布设形式和要求的说法,错误的是()。
蓝色硅胶由于含量有少量氧化钴,有毒,应避免和食品接触、吸入口中和进入眼睛。
住宅必须具有遮风、避雨、保温、隔热、采光、通风、隔声、防潮、防火、防震等功能,这
对于结核性胸膜炎的胸水蛋白含量高,容易引起胸膜粘连,抽胸水的原则是
下列H1受体拮抗剂药物的性质和应用中,错误的是
对持续经营能力期间,当注册会计师可能认为有必要提请管理层作出评估或延长评估期间,
根据我国《证券法》的规定,投资咨询机构及其从业人员从事证券服务业务不得有()的
在给新生儿低钙血症患儿进行钙剂治疗过程中,若发生药液外渗,为避免组织坏死,护士应立即停止注射,并给予()。A.地塞米松软膏外敷B.如意金黄散外敷C.仙
主要有效成份是绿酸原,异绿原酸的清热药是()A.知母漂B.黄芩C.苦参D.金银花E.连翘
共用题干 2011年,某房地产公司拥有房产20栋,使用情况如下:(1)公司经营用房10栋,价值3000万元;(2)自2011年1月,将一栋出租给某公司做...