2017年6月大学英语阅读理解选词填空源文
6月四六级真题答案去哪找？6月17日锁定新东方网四六级频道，超全四六级真题及答案考试结束后免费供应，想第一时间查答案的小朋友快来领取地址（ ）！想知道新东方老师如何点评6月考试→_→
Science
Ancient Chinese beer recipe reveals surprising ingredient
By Emily BensonMay. 23, 2016 , 3:00 PM
Beer recipes change over time. Hops, for example—which give many a modern
brewski its bitter, citrusy flavor—are a relatively recent addition to the
beverage, first mentioned in reference to brewing in the ninth century. Now,
researchers have found a surprising ingredient in residue from 5000-year-old
beer brewing equipment. While excavating two pits at a site in the central
plains of China, scientists discovered pottery fragments from pots, funnels,
amphorae, and stoves (stove fragment pictured). The different shapes of the
containers suggest they were used to brew, filter, and store beer—they may be
ancient “beer-making toolkits,” and the earliest direct evidence of beer brewing
in China, the researchers report online today in the Proceedings of the National
Academy of Sciences. To test that hypothesis, the team examined the yellowish,
dried dregs inside the vessels. About a third of the starch grains they found
were pitted, swollen, folded, or distorted—types of mangling that can occur
during the malting and mashing needed to make beer. The majority of the
grains—about 80%—were from cereal crops like millet and barley, and about 10%
were bits of tubers, including yam and lily, which would have sweetened the
brew, the scientists say. Barley was an unexpected find: The crop was
domesticated in western Eurasia and didn’t become a staple food in central China
until about 2000 years ago, according to the researchers. Based on that timing,
they suggest barley may have arrived in the region not as food, but as fodder
for brewing beer.
【考后估分】
新东方四六级估分系统，逼真还原6月试题，精准估分提早了解过没过线！具体估分规则，敬请关注新东方网四六级真题解析专题！
页:
[1]