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
Once they decided to have children, MiShel and Carl Meissner tackled the next big issue: Should they try to have a girl? It was
Once they decided to have children, MiShel and Carl Meissner tackled the next big issue: Should they try to have a girl? It was
admin
2016-10-07
29
问题
Once they decided to have children, MiShel and Carl Meissner tackled the next big issue: Should they try to have a girl? It was no small matter. MiShel’s brother had become blind from a hereditary condition in his early 20s, and the Meissners had learned that the condition is a【C1】______passed from mothers to sons. If they had a boy, he would have a 50 per cent chance of having the condition. A girl would be【C2】______.
The British couple’s inquiries about gender selection led them in 1999 to Virginia, US where a new sperm (精子)-separation technique, called MicroSort, was under【C3】______. When MiShel became pregnant, she gave birth to a daughter. They will try to have a second daughter using the technique later this year.
The technique separates sperm into two groups—those that carry the X-chromosome (producing a female baby) and those that carry the Y-chromosome (producing a male baby). The technology was developed in 1990s, but last month’s opening of a laboratory in California【C4】______the company’s first expansion.
"We believe the number of people who want this technology is greater than those who have【C5】______to it," said Keith L. Blauer, the company’s clinical director.
This is not only a【C6】______effective way to select a child’s gender. It also brings a host of ethical (伦理的) and practical considerations—especially for the majority of families who use the technique for【C7】______reasons.
The clinic offers sex selection for two purposes: to help couples avoid passing on a gender-linked【C8】______disease and to allow those who already have a child to ’balance" their family by having a baby of the opposite sex
The technology is still【C9】______. However, Blauer says the company has an impressive success rate: 91 per cent of the women who become pregnant after sorting for a girl are successful, while 76 per cent who sort for a boy and get pregnant are successful.
The technique separates sperm based on the fact that the X-chromosome is larger than the Y-chromosome. A machine is used to【C10】______the size differences and sort the sperm accordingly. The result is then checked using another type of DNA analysis to ensure that it contains mostly X-or Y-bearing sperm. The desired sample is then used for artificial insemination (授精) or test tube fertilization.
A. genetic B. overlapped C. marked D. unaffected
E. perpetually F. investigation G. access H. feat
I. disorder J. gropes K. experimental L. seemingly
M. elicit N. nonmedical O. distinguish
【C6】
选项
答案
L
解析
此处应为副词,形容这种新技术有效使用的程度或范围。根据上文描述的个案,可以知道这种技术“看起来”很有用,而在副词词库中,seemingly具有与此相同的意思,因此本题答案为seemingly。
转载请注明原文地址:https://kaotiyun.com/show/gvY7777K
0
大学英语四级
相关试题推荐
A、Shecouldn’thavelefthernotebookinthelibrary.B、Shemayhaveputhernotebookamidthejournals.C、Sheshouldhavemade
A、Theyshouldgiveuptalking.B、Theyshouldbothmakeacompromise.C、Theycanmeetnexttime.D、Theyarebothhalfway.B男士话中的“
We’renowwitnessingtheemergenceofanadvancedeconomybasedoninformationandknowledge.Physical【B1】_______,rawmaterials
We’renowwitnessingtheemergenceofanadvancedeconomybasedoninformationandknowledge.Physical【B1】_______,rawmaterials
DueAttentionShouldBePaidtoInternetSafety1.很多网民的利益及隐私受到侵犯和威胁2.造成这种现象的原因是……3.为了提高网络安全,我认为……
Writeashortessaybasedonthepicturebelow.YoushouldstartyouressaywithabriefaccountofReadingBooks.Youshouldwr
Mostpeoplewouldagreethat,althoughourageexceedsallpreviousagesinknowledge,therehasbeennocorrelativeincreasein
BullyingandChildrenA)Whatyoursonisdescribingisbullying,plainandsimple.Althoughitislateintheschoolyear,yous
Accordingtonewgovernmentfigures,pollutionlevelsarerisingagainafterseveralyearsofgradualdecline.Data【C1】_____
随机试题
下列可作为栓剂基质的物质有()
青霉素类最严重的不良反应是
施工方的项目管理,是指自项目开始至项目完成,通过项目策划和项目控制,实现项目的费用目标、进度目标和质量目标。对此,下列说法正确的是()。
下列人员中,不可能成为打击报复会计人员罪主体的是()。
下列关于LOF份额申购和赎回的说法中,错误的是()。
下列关于公司股东出资方式的表述中,不符合公司法律制度规定的是()。
在展望未来社会的问题上,是否坚持科学的立场、观点和方法是能否正确预见未来的基本前提,也是马克思主义与空想社会主义的根本区别。马克思主义经典作家站在科学的立场上,提出并自觉运用了预见未来社会的科学方法,其科学立场和方法主要体现在()。
集中体现毛泽东思想关于社会主义革命和建设理论的主要著作有()。
与“SELECT*FROM歌手WHERENOT(最后得分>9.00OR最后得分<8.00)”等价的语句是
Manistheonlyanimalthatlaughs.Whyisthistrue?Whatmakesusrespondaswedotopleasurableexperiences?Whatisthehis
最新回复
(
0
)