2. 外语
  3. 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

admin2013-06-03  68
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.
Which of the following explanations regarding the high number of Caesarean operations is NOT true?
选项 A、Some mothers have passed the best age for a natural delivery.
B、Some mothers have fertility problems.
C、Some mothers favor the operations of this type.
D、Some mothers have had surgical operations on their fallopian tubes.
答案C
解析 推理判断题。文中介绍了选择试管怀孕的大多数母亲的特征：或高龄、或不育、或做过输卵管手术，但并未说一些母亲是否喜欢这种方式，故C说法错误，为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/jbM7777K
0

大学英语四级

相关试题推荐
随机试题
最新回复(0)