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  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

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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 in vitro pregnancies. The Australians report that the pregnancies themselves seemed to proceed 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. Undone 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 none 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.
What does the Latin word "in vitro"(Paragraph Two) most probably mean?
选项 A、Normal.
B、Test-tube.
C、Virtual.
D、Fallopian tube.
答案B
解析 推理题。找到“invitro”所在的那句话“The earliest answers come from Australia, where a group of medical experts at the Queen Vietoria Mexiical Center in Melbourne have taken a look at the continent’s first nine successful in vitro pregnancies．”而这句话的前一句是人们担心试管婴儿从怀孕到出生是否正常，而接下来说“最早的答案来自于澳大利亚墨尔本维多利亚女王医学中心的一组医学专家，他们观察了澳大利亚头九例in vitro怀孕。”由此来推断invitro应该是试管。
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