2019年考博英语完形填空每日一练（10月25日）

希赛网英语考试频道为大家分享2019年考博英语考试试题每日一练，同时提供答案及翻译，各位考生多做模拟试题练习语法语感，提高考试水平。

A potful of evidence suggests that the antioxidants and polyphenols in tea help protect you from stroke and heart attack,Alzheimer's disease,arthritis,and cancers of the lung,mouth,breast,pancreas,prostate and skin.The essential oils found in the leaves even aid 1 by increasing the flow of digestive juices.

Now it turns out that tea,2 chicken soup or echinacea,is what can give your body an extra 3 to help it battle infections.

Given 20 ounces of tea daily,non-tea drinkers were better able to fight 4 bacterial diseases,according to a study at Brigham and Women's Hospital in Boston.The researchers 5 L-theanine,an 6 found in black,green,oolong and pekoe teas--but not in 7 teas,which usually don't contain Camellia sinensis,the one true tea 8.

When broken down by the liver,L-theanine becomes an antigen called ethylamine,9 primes the response of gamma-delta T cells against a 10 of bacterial,viral,fungal and parasitic 11,and possibly tumors.(Ethylamine is also found in other plant-based foods,such as apples,mushrooms and wine.)

In the study,blood samples from new tea drinkers were 12 to E.coli,bacteria 13 food poisoning and ulcers.The 14 cells in the tea drinkers produced five times the interferon?an important element of the body's 15 system--than they had before tea was 16.No change was noted in a 17 group of coffee drinkers.

“I don’tthink there’s a 18 to[drinking tea],”says co-author Jack F.Bukowski,M.D,of Harvard Medical School.While tea won’t 19 you or make you immune from illness,“people who do get sick will probably get a milder 20,”Bukowski says.

【参考答案】

1-5：BBAAC

6-10：DADAC

11-15：BADDB

16-20：ABACD

【参考译文】

一壶证据表明茶中的抗氧化剂和多酚有助于预防中风、心脏病、阿尔茨海默氏症、关节炎以及肺癌、口腔癌、乳腺癌、胰腺癌、前列腺癌和皮肤癌。树叶中发现的精油甚至可以通过增加消化液的流动来帮助消化。

现在事实证明，茶，2个鸡汤或紫锥菊，可以给你的身体额外3个，以帮助它对抗感染。

波士顿布里格姆妇女医院(Brigham and Women's Hospital)的一项研究表明，每天饮用20盎司茶的人，不喝茶的人更能抵抗4种细菌性疾病。研究人员在红茶、绿茶、乌龙茶和白毫茶中发现了l-茶氨酸，但在7种茶中没有发现l-茶氨酸。

当l-茶氨酸被肝脏分解时，它就会变成一种叫做乙胺的抗原，9会启动-delta T细胞对抗10种细菌、病毒、真菌和寄生虫，甚至可能是肿瘤的反应。(乙胺也存在于其他植物性食物中，比如苹果、蘑菇和葡萄酒。)

在这项研究中，新喝茶的人的血液样本是12到E。大肠杆菌，细菌13食物中毒和溃疡。饮茶者体内的14个细胞产生的干扰素是干扰素的5倍，这是人体15个系统中的一个重要组成部分——比他们在16岁时喝茶的时候更重要。在17组喝咖啡的人中没有发现变化。

研究报告的撰写者之一杰克布可夫斯基说:“我不认为有18个人喝茶。”哈佛医学院的博士。布可夫斯基说，虽然喝茶不会让你或使你免于生病，但“生病的人可能会得到较轻的茶。”