PTE学术英语考试,英文名称Pearson Test of English Academic(PTE Academic),也被译为培生英语考试，是由培生教育集团(Pearson)开发并得到GMAC(Graduate Management Admission Council )认可的一款新的基于电脑的国际学术英语考试。它为那些需要学术英语的机构例如大学，高等学府以及政府部门提供了一个真实的衡量考生能力的工具。为需要通过英语考试获得赴英语国家学习机会的非英语国家的学生提供了一种新的选择。 PTE阅读薄弱的同学赶紧收藏啦!什么?你在PTE其他科目也遇到瓶颈了?
一.Now it looks like that link between friends and better health is true for the major online social network, too: Facebook. Researchers compared the health records of 12 million Facebook users to nonusers, in California.After controlling for things like age, race, and gender, they found that being on Facebook was associated with a slightly lower risk of death in a given year.Now, some of that could be explained by the fact that Facebook users might be more affluent, or have better access to healthcare.So the researchers did a second analysis- by looking only at Facebook and nonFacebook users on the California voter rolls,which is a sort of proxy control for socioeconomic status. And the association still held up.The study is in the Proceedings of the National Academy of Sciences. Of course correlation does not equal causation.
现在看来，朋友之间的联系和更好的健康状况对于主要的在线社交网络来说也是一样的:Facebook。研究人员比较了加州1200万Facebook用户和非Facebook用户的健康记录。在控制了年龄、种族和性别等因素后，他们发现，在Facebook上，在某一年中死亡的风险略低。现在，其中一些可以解释为Facebook用户可能更富裕，或者更容易获得医疗保健。因此，研究人员做了第二项分析——只查看了Facebook和加州选民名册上的非Facebook用户，这是对社会经济地位的一种代理控制。这个协会仍然成立。这项研究发表在《美国国家科学院院刊》上。当然，相关并不等于因果关系
二.Martens and his team modeled that scenario in mice who'd been born free of microbes. They seeded the mice's guts with a human gut microbiomeand and
then fed them a high fiber diet: raw milled corn, whole wheat, whole soybeans and oats.
It's about as raw of a diet as you can get.The human equivalent: double our recommended daily intake of fiber. It's a lot of kale.
That extreme high-fiber diet helped keep the mucus barrier intact.But in mice that had zero fiber-or the kind of soluble fiber typically added to
processed foods-the fiber-eating members of the gut dwindled.Their absence opened up more real estate for mucus-munching bacteria,
which boomed in number, and tore through the protective mucus wall-leaving intestinal cells open for microbial attack.
The study is in the journal Cell. The results suggest that the recent history of your diet could predispose how you react to an enteric pathogen.
马滕斯和他的团队在出生时没有微生物的老鼠身上模拟了这个场景。他们在老鼠的内脏中植入了人体肠道微生物
然后喂给他们高纤维的食物:生玉米，全麦，全大豆和燕麦。
它是你能得到的最原始的饮食。人体相当于:我们推荐的每日纤维摄入量增加一倍。很多羽衣甘蓝。
高纤维饮食有助于保持粘液屏障完好无损。但在没有纤维的小鼠中——或者是可溶性纤维通常被加入的小鼠中
加工过的食物——吃纤维的肠道成员减少了。它们的消失为咀嚼粘液的细菌开辟了更多的空间，
它的数量激增，撕破了保护粘液壁，让肠道细胞对微生物的攻击开放。
这项研究发表在《细胞》杂志上。研究结果表明，你最近的饮食史可以预先决定你对肠道病原体的反应。
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