首页
登录
职称英语
The idea of test-tube babies may make you either delighted at the wonders of
The idea of test-tube babies may make you either delighted at the wonders of
游客
2023-12-28
66
管理
问题
The idea of test-tube babies may make you either delighted at the wonders of modem 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 thing is true of the single heart defect. It usually shows up in only 15 out of 60,000 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. [br] What concern will the test-tube baby raise according to the passage?
选项
A、Whether the pregnancies of test-tube babies would be normal.
B、Whether the test-tube babies would be encouraged.
C、Why the proportion of defected babies is so high.
D、Why the number of Caesareans is so high.
答案
A
解析
参看第一段最后一行的Are these pregnancies normal? Are the babies normal?
转载请注明原文地址:https://www.tihaiku.com/zcyy/3311427.html
相关试题推荐
它已经推出了一些既不依赖英国宽松的税收政策,也不依赖海外富豪的产品。(neither…nor…)Italreadyofferssomeproducts
KingdomofWonders,______in1995inFremont,Calif.,becameanindustrylegend
Theideaoftest-tubebabiesmaymakeyoueitherdelightedatthewondersof
KingdomofWonders,______in1995inFremont,Calif.,becameanindustrylegendf
Iknewnothingofthemotivesbehindhisrecentmove,andIdon’tknoweitherth
Evidencecameupwhichspecificspeechsoundsarerecognizedbybabiesasyoung
Virtuallyeverytheoryhasbeenconcernedwitheitherthestructureorthefunct
Iknewnothingofthemotivesbehindhisrecentmove,andIdon’tknoweitherth
KingdomofWonders,______in1995inFremont,Calif.,becameanindustrylegend
Evidencecameupwhichspecificspeechsoundsarerecognizedbybabiesasyoung
随机试题
PERPLEXED:CLARIFICATIONA、relaxed:recreationB、learned:professionC、anxious:r
Howmenfirstlearnedtoinventwordsisunknown;【B1】,theoriginoflangu
Normally,atthebeginningoftheschoolyear,theStudentServicesofunive
72 与核内质子数Z、中子数N的关系式是 A=Z+N N=A-Z=125-53=72
A.神经外胚叶 B.中胚叶 C.脑神经嵴细胞 D.内胚叶 E.表皮外胚叶
A.细胞繁殖增大和细胞间质增加 B.细胞和组织的分化及功能的不断完善 C.分
公路工程的消耗量定额分为()。A.施工定额 B.预算定额 C.概算定额 D
女性,55岁。右耳垂下无痛性肿块逐渐缓慢长大6年。触诊肿块界线清楚,活动,约4c
定喘(EX-B1)
下列标点符号使用正确的一句是:A.我国月球探测工程将分三步实施:一是“绕”,即卫
最新回复
(
0
)