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
The idea of test-tube babies may make you either delighted at the wonders ’of modern medicine or irritated while considering the
The idea of test-tube babies may make you either delighted at the wonders ’of modern medicine or irritated while considering the
admin
2013-06-03
23
问题
The idea of test-tube babies may make you either delighted at the wonders ’of modern medicine or irritated while considering the moral, or legal, or technological implications of starting life in a laboratory. But if you’ve ever been pregnant yourself, one thing is certain. You wonder what it’s like to carry a test-tube baby. Are these pregnancies normal? Are the babies normal?
The earliest answers come from Australia, where a group of medical experts at the Queen Victoria Medical Center in Melbourne have taken a look at the continent’s first nine successful invitro pregnancies. The Australians report that the pregnancies themselves seemed to have proceeded according to plan, but at birth some unusual trends did show up seven of the nine babies turned out to be girls. Six of the nine were delivered by Caesarean section. And one baby, a twin, was born with a serious heart defect and a few days later developed life-threatening problems.
What does it all mean? Even the doctors don’t know for sure, because the numbers are so small. The proportion of girls to boys is high, but until there are many more test-tube babies no one will know whether that’s something that just happened to be like that or something special that happens when egg meets sperm in a test tube instead of a fallopian tube. The same thin is true of the single heart defect. It usually shows up in only 15 out of 60000 births in that part of Australia, but the fact that it occurred in one out of nine test-tube babies does not necessarily mean that they are at special risk. One thing the doctors can explain is the high number of Caesareans. Most of the mothers were older, had long histories of fertility problems and in some cases had had surgery on the fallopian tubes, all of which made them likely candidates for Caesareans anyway.
The Australian researchers report that they are quite encouraged. All the babies are now making normal progress, even the twin with the birth defects.
What does the word "invitro" underlined in Paragraph 2 most probably mean?
选项
A、Normal.
B、Test-tube.
C、Built-in.
D、Formal.
答案
B
解析
语义理解题。首段第二句中carry a test-tube baby提示了invitro的含义,它的含义可以从上下文语境中推测出来。
转载请注明原文地址:https://kaotiyun.com/show/NbM7777K
0
大学英语四级
相关试题推荐
____________(这件夹克不但太大),thejacketdon’tmatchmytrouserseither.
Researchershaveestablishedthatwhenpeoplearementallyengaged,biochemicalchangesoccurinthebrainthatallowittoact
Researchershaveestablishedthatwhenpeoplearementallyengaged,biochemicalchangesoccurinthebrainthatallowittoact
Researchershaveestablishedthatwhenpeoplearementallyengaged,biochemicalchangesoccurinthebrainthatallowittoact
Researchershaveestablishedthatwhenpeoplearementallyengaged,biochemicalchanges【S1】______inthebrainthatallowittoa
Thepassageismainlyabout______.AcoastguarddoesNOTrequirethelifepreservertobemade______.
Whentimeswerehard,whitementhoughtthatChineseAmericanswereresponsibleforthewhitemen’sunemployment.Manydescenda
Ifyoutakethismedicinetwiceaday,itwill______yourcoldinafewdays.
Thepassagemainlydealswiththenegativeconsequencesofbreak-uponindividuals.Whenchoosingnewpartners,oneisoftenat
随机试题
噪声可使人听力损失、使人烦恼和影响人注意力的集中。()
A.通腑泄热,化痰祛瘀B.息风清火,豁痰开窍C.化痰通络,凉营开窍D.平肝息风,化痰通络中风中脏腑阳闭的治法是
关于肠梗阻临床表现的描述,下列说法正确的是
4月30日A厂广告及甲公司订单是什么性质?为什么?5月2日和5月3日A厂与甲公司双方的传真产生什么法律效果?
某家庭申请了25万元10年期住房抵押贷款,年利率为6%。该家庭在按月等额偿还4年后,于第5年年初一次偿还了本金6万元,则从第5年开始该家庭的月还款额减少了()元。
只能用于转账,不能支取现金的支票有()。
“可转换债券”可以在特定时间、按特定条件转换为()。
税后利润与股本总数的比率是()。
关于法律推理,下列说法不正确的是()
以下叙述中正确的是
最新回复
(
0
)