紫皮的og 有两道题目想了 半天 ,也很同学讨论了很久,还是没个结果,请大家帮帮忙,讨论一下,我只写出了部分题目. 6.for example, emerged as an epdidemic in the united states in the twentieth century ,by then ,modern sanitation was able to delay exposure to polio until adolescence or adulthoodat which time polio infection produced paralysis, previously, infection has occured during infancy,when it typically provided lifelong immunity without paralysis,thus, the hygiene that helped prevent typhoid epidemics. (polio是小儿麻痹症的缩写) 然后 我想问的是最后一句话,问题是 如果缺少 modern sanitation 会使the epidemic of tyhpoid or the epidemic of paralytic polio among infant happened? 我搞不清它的逻辑关系,我的理解是 现代的santation使polio推迟到 成年发生,如果没有的话,就是在儿童时期发生,里面又说了免疫力,文章到底是赞同小时候生polio好还是推迟到长大?
14. 这个讲的是体内平衡,说沙漠中的老鼠来保持 maintaining adequate interal fluid balance, One countermeasure is behavioral:these rats stay in burrows during the hot part of the day, thus avoiding loss of fluid through panting or sweating,which are regulatory mechanisms for maintaining internal body temperature by evaporative cooling. thus avoiding loss of fluid through panting or sweating,
这句话里的 through 是什么意思 我没看懂这句话的意思 这个说通过出汗来避免体液的流失?出汗不是 就是出的是水分嘛 前后矛盾? 他题目是it can be inferred from the passage that some mechanism that regulate interal body temperature ,like sweating and panting,can lead to which of the following? A:a drop in the body"s internal fluid lever 避免出汗的话 那文章后面不是说 要出汗吗 这样可以调节体温.这个论据在文章里起什么作用,是什么关系呢? 一大早起来发题,谢谢大家.
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