问题
单项选择题
2012年03月24日夜，安徽省舒城县发生一起非法拘禁案件，受害人管大勇在家中被人暴力挟持走，于03月25日凌晨在被挟持至河南原阳的途中死亡，后被犯罪嫌疑人抛尸至高速路边。请网上排查案发后四个月（2012年03月25日至2012年07月25日）内安徽、河南两省所发的未破命案共有（）起。
A.4
B.8
C.12
D.16
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
2012年03月24日夜，安徽省舒城县发生一起非法拘禁案件，受害人管大勇在家中被人暴力挟持走，于03月25日凌晨在被挟持至河南原阳的途中死亡，后被犯罪嫌疑人抛尸至高速路边。请网上排查案发后四个月（2012年03月25日至2012年07月25日）内安徽、河南两省所发的未破命案共有（）起。
A.4
B.8
C.12
D.16
参考答案：C
| 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. |
What is the author’s tone in this passage
A．Depressed.
B．Optimistic.
C．Opposing.
D．Negative.