分析 几个月前土豆被认为是肥胖的敌人,但一项新的研究显示土豆并没有那么不好.
今年6月,哈佛大学的研究人员发现,每天吃一些土豆,不论是否被磨碎、油炸或烤,都比一罐饮料或者一些肉更容易使体重增加.结论是因为土豆总是被做成食物---更容易改变淀粉导致血糖增加,身体不得不加倍运作但血糖下降让人饥饿,导致吃更多的食物.
但奥塔戈大学的研究今天给土豆的爱好者带来了一些好消息.研究发现血糖生成指数(GI)在混合食物中很难分析.在一般情况下,不同的食品检测到的GI比全餐低.该研究的作者之一,海莉多德说."但是,在这项研究中,三顿饭的GIs分析食物都含有鸡肉、豌豆、胡萝卜和羊肉一起,很多食物,包括土豆、米饭或面条."
发现显示每餐的GI指数比想象中的要低.研究人员预期土豆的GI是65,但实际上是53."虽然马铃薯被认为是高GI食物---但我们的工作表明,饮食中有少量的土豆并不会使你的血糖高.
这项研究涉及到18-50岁的30个健康人,该研究已经在10月份发布在美国的十月期刊上.
解答 8--11DBBB
8题答案是D.细节考查题.文章第一二段都是说土豆能增加体重的不好消息,第三段是说好消息,自然是对于土豆爱好者而言的.故答案是D.
9题答案是B.细节考查题.根据The conclusion was that it happened because potatoes were always cooked-----making it easier for the body to change the starch(淀粉) which would increase the blood sugar levels.可知土豆容易使人发胖是因为它被烹调.故答案是B.
10题答案是B.细节考查题.根据The body then had to work extra hard to get levels down but falling blood sugar made people hungry,which led to eating more food.可知低血糖容易使人饿.故答案是B.
11题答案是B.细节考查题.根据our work suggests that having a small amount of potato with a meal isn't going to drive your blood sugar high可知和其他食物一起引用,土豆不会使人发胖.故答案是B.
点评 文章讲述了土豆不会使人发胖的一些研究说明.题目涉及多道细节理解题,做题时需要结合原文和题目有针对性的找出相关语句进行仔细分析,结合选项选出正确答案.
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