英语四级 学英语,练听力,上听力课堂! 注册 登录
> 英语四级 > 英语四级教程mp3 > 2010年12月英语四级听力练习 >  第15篇

2010年12月英语四级听力练习十五

所属教程:2010年12月英语四级听力练习

浏览:

手机版
扫描二维码方便学习和分享
https://online2.tingclass.net/lesson/shi0529/0007/7694/tingclass_cet42010110988.mp3
https://image.tingclass.net/statics/js/2012

Around the world, cesarean births are on the rise, and many experts think that's a bad thing. Now, a new study looks at one way that babies delivered by c-section are different. 

_________________________________. Some cesareans are medically necessary. But in other cases, women just want the convenience of knowing when they will give birth. For some, it's the modern thing to do. Doctors like that predictability, too. And health care providers usually charge more. 

A World Health Organization survey of hospital and clinic births in 9 Asian countries earlier this year found 27% were c-sections, and _________________________. And there were more deaths and complications when women had a cesarean delivery that wasn't medically required. Other research has found c-section babies are more likely to have asthma or allergies. 

Now, a small but intriguing new study looks at one way _________________________. Co-lead author Elizabeth Costello, now at Stanford, was at the University of Colorado when the study was done. 

"We were looking at the effect of delivery mode on the very first bacteria that the baby is exposed to. So we sampled babies literally seconds and minutes after they were delivered.  And so we're only looking at a snapshot of that very first moment in time."

(1)The number of surgical deliveries has been increasing for years
(2)in China it was nearly half of all births
(3)the delivery method might affect the baby's health

用户搜索

疯狂英语 英语语法 新概念英语 走遍美国 四级听力 英语音标 英语入门 发音 美语 四级 新东方 七年级 赖世雄 zero是什么意思广州市白云农工商宿舍英语学习交流群

网站推荐

英语翻译英语应急口语8000句听歌学英语英语学习方法

  • 频道推荐
  • |
  • 全站推荐
  • 推荐下载
  • 网站推荐