单选题 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 {{U}}invitro{{/U}} 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.

单选题Many citizens appealed to the city government for enacting ______ laws to protect the consumers. A. rigorous B. equivocal C. stringent D. furtive

单选题The goal of the blogs in this case has been to confirm ______ that the report was fake, and then squeeze the truth out of the facts.

单选题In the 1910s most North Americans believed that the Nuclear Family ______.

单选题The guests were in a jubilant mood as the wedding began, and the whole atmosphere was very very pleasing.

单选题The word "inaccessible" underlined in Paragraph I is closest in meaning to ______.

单选题The examiner failed some candidates, and 15 of them being students without work experience.

单选题The children should say "thank you" to you when you gave them gifts.

单选题Your ______ is the round of things that you usually do each day. A. practice B. habit C. routine D. custom

单选题Is it possible that the entire tale is but a Ugarbled/U account of that voyage and Biarni another name for Leif?

单选题The author's attitude shown in this passage toward "backward" languages is ______.

单选题I, ______ , do not believe that the era of the pioneer is at an end; I only believe that the area for pioneering has changed.

单选题The first recorded use of natural gas to light street lamps it was in the town of Frederick, New York, in 1825.

单选题This majestical roof fretted with golden fire, why, it appeared nothing to me but a foul and {{U}}mortal{{/U}} congragation of vapours. A. pestilent B. violent C. protuberant D. provident

单选题I suppose the party ended in a friendly atmosphere, isn't it? A. don't I B. do I C. did it D. didn't it

单选题Upon completing his examination over the patient, the doctor offered his judgment of her conditions. A. of B. off C. about D. around

单选题Doctors warned sun-starved tourists who received too much sunlight that they were at {{U}}seriously{{/U}} risk than others of contracting skin cancer.

单选题The first year of the college life is a very complex ______ period, and the more fully the freshmen prepare for it, the better.

单选题A good dictionary will help you up in your reading.

单选题Earth observations should provide "value added" applications from existing environmental services, property title holders and process driven financial firms, while creating greater liquidity within the corporations that use them. A. as B. to C. for D. with