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
54
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
【C5】
选项
答案
G
解析
此处应为名词,可与have和to搭配成have n.to sth.的词组。根据搭配的要求在名词词库中寻找,可以发现access为本题答案。have access to…意为“有权/能够使用”。
转载请注明原文地址:https://kaotiyun.com/show/MvY7777K
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……
BullyingandChildrenA)Whatyoursonisdescribingisbullying,plainandsimple.Althoughitislateintheschoolyear,yous
BullyingandChildrenA)Whatyoursonisdescribingisbullying,plainandsimple.Althoughitislateintheschoolyear,yous
Accordingtonewgovernmentfigures,pollutionlevelsarerisingagainafterseveralyearsofgradualdecline.Data【C1】_____
Accordingtonewgovernmentfigures,pollutionlevelsarerisingagainafterseveralyearsofgradualdecline.Data【C1】_____
Threekeyfactsaboutrisingsealevelsneedtobepointedouttotheworld’spoliticiansandplanners:sea-levelriseisnowin
随机试题
活血行气止痛作用强,研末服即有效的药物是
子宫脱垂Ⅲ度为
下列关于隧道施工的安全要点的说法,正确的有()。
在社会总需求不变的情况下,由于厂商的退出使总供给减少,引起价格上涨,即形成由供给因素变动的通货膨胀,可以归结为两类原因。下列选项属于两类原因的有()。
Howlongcanhumanbeingslive?Mostscientistswhostudyoldagethinkthatthehumanbodyis【C1】______tolivenolongerthan1
下列关于我国村民委员会的表述,正确的是()。
设an是绝对收敛的级数,证明由an的一切正项组成的级数pn是收敛的;由an的一切负项组成的级数(一qn)也是收敛的。
在考生文件夹下,存在一个数据库文件“sampl.accdb”,里边已建立“tGrade”和“tStudent”两个表对象;同时还存在一个Excel文件“tCourse.xls”。试按以下操作要求,完成表的编辑:设置“tStudent”表的显示格式,使表
GesturesI.Universalusageofgesturesincommunication1)GesturesarewidelyusedespeciallyinArabcountries.2)Gesturesh
I’dratheryou______thoseimportantdocumentswithyou.
最新回复
(
0
)