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PTE口语练习题训练(四)

2017-07-14 15:18 作者:admin
摘要:下文是100留学​总结的口语练习题,PTE口语薄弱的同学赶紧收藏啦

  下文是100留学总结的口语练习题,PTE口语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?赶紧添加高分助教jason(微信ptelixiang)获取更多帮助吧~


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.

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