英语题源报纸期刊 | 有机农副产品=传统农副产品?(第112期)

来源: 发布于 2018-08-04  浏览 次  

Text

The way your fruits and vegetables are grown makes a big difference, right? Don't be so sure.

Few things make you feel better about your health than eating organic fruits and veggies. A diet high in produce is commendable enough, but organic produce? That's a double dose of virtue. What's less clear is how much good that virtue does you. Are there real benefits to going organic? If so, are some organic fruits and vegetables better than others? And how do you choose?

One thing is certain: it's easier than ever to find organic produce. As demand for pesticide—and chemical—free foods has grown, the onetime niche product has gone mass market. Sometimes organic produce simply looks or tastes better, which for me is often reason enough to pay the higher price it may sell for. And sure, it makes sense to avoid pesticides as much as possible. At the same time, scientists have yet to document a definite, long-term negative effect of modern pesticides on our bodies, meaning that while organic foods do you no harm, they may not turn out to be as beneficial as you think.

The evidence of nutritional advantages is almost as thin. Never mind the idea that organically grown foods fairly burst with vitamins that modern farming techniques drain out of crops. To date most studies have either shown no difference between organic and conventional produce or found very small pluses in the organic column, such as slightly higher levels of vitamin C or other antioxidants.

Researchers at the University of California at Davis, however, have recently added to our understanding of hidden benefits in organic foods. In a 10-year study, the longest of its type so far, food chemist Alyson Mitchell and her team compared levels of two antioxidants—quercetin and kaempferol (山奈酚 )—in tomatoes. They found that tomatoes grown in organic fields yielded significantly higher amounts of these nutrients (an average of 79% and 97%, respectively) than their conventional counterparts.

Quercetin and kaempferol are members of a larger group of antioxidants known as flavonoids, which when consumed in foods have been associated with reduced risks of chronic health conditions like heart disease, certain cancers and even some forms of dementia. The team also found that the greater the number of seasons tomatoes are grown in organic fields, the higher the soil quality becomes and the higher the level of the flavonoids climbs.

Impressive as these findings are, they alone may not be enough to advocate shelling out the extra bucks or driving those few miles farther to buy organic. For starters, the study was conducted in a highly controlled setting, so it's not clear we'd get the same results in the real world of organic farming, where conditions vary from farm to farm and field to field.

小试牛刀

1. The author begins the essay by .

A. giving an example

B. illustrating a wrong idea

C. stating a fact

D. listing a series of statistics

2. What can we infer from paragraph 3?

A. Most people will pay higher prices for organic fruits or veggies for their better looks or tastes.

B. Organic foods are not beneficial to our bodies.

C. Organic food is a kind of pesticide and chemical free food.

D. Modern pesticides have a definite, long-term negative effect on our bodies.

3. According to the essay, which of the following statements is is NOT true about organic fruits or veggies?

A. They are pesticide and chemical free.

B. Compared with conventional foods they are richer in vitamins.

C. It's easier to find them than before.

D. We should try our best to avoid pesticides.

4. Which of the following statements is NOT true according to the study of Alyson Mitchell and her team?

A. Quercetin and kaempferol in tomatoes may cure certain cancers.

B. To consume more tomatoes grown in organic fields will reduce risks of heart disease.

C. Tomatoes grown in organic fields have higher levels of quercetin and kaempferol.

D. The longer tomatoes are grown in an organic field, the higher the level of flavonoids in that field becomes.

5. What's the author's attitude toward the advantages of organic foods?

A. Positive.

B. Negative.

C. Critical.

D. Dubious.

BCBAD

后台回复“题源报刊合集”

可以查看往期所有题源报刊的答案和解析了!

核心词汇

organic[ɔ:ˈgænɪk]

adj. 器官的,有机的, 组织的

chronic[ˈkrɒnɪk]

adj. 慢性的,延续很长时间的

virtue[ˈvɜ:tʃu:]

n. 美德,贞操,优点,功效,英勇

impressive[ɪmˈpresɪv]

adj. 给人印象的,感人的

mass[mæs]

n. 块;大多数;质量;群众

adj. 群众的,大规模的,集中的

vt. 使集合

vi. 聚集

advocate[ˈædvəkeɪt]

n. 提倡者,鼓吹者

vt. 提倡,鼓吹

conduct[kənˈdʌkt]

n. 行为,操行

vt. 引导,管理;传导

definite[ˈdefɪnət]

adj. 明确的,一定的

burst[bɜ:st]

vi. 爆裂;爆发

n. 突然破裂; 爆发;脉冲

commendable[kəˈmendəbl]

adj. 值得表扬的

conventional [kənˈvenʃənl]

adj. 惯例的, 常规的,习俗的,传统的

antioxidant[ˌæntiˈɒksɪdənt]

n. [化]抗氧化剂,硬化防止剂

yield[ji:ld]

vt. 出产,生长,生产

vi. (~ to)屈服,屈从

n. 产量,收益

quercetin['kwɜ:sɪtɪn]

n. 橡黄素

dementia [dɪˈmenʃə]

n.[医]痴呆

respectively [rɪˈspektɪvli]

adv. 分别地,各个地

flavonoids [f'leɪvənəʊɪdz]

n. 类黄酮

长难句解析

1. At the same time, scientists have yet to document a definite, long-term negative effect of modern pesticides on our bodies, meaning that while organic foods do you no harm, they may not turn out to be as beneficial as you think.

结构分析:本句是一个简单句。句子主干是 At the same time,scientists... on our bodies;meaning that... as you think是个现在分词短语作状语,表伴随;while引导的是一个让步状语从句;as beneficial as you think是一个as... as引导的比较状语从句,同时又是一个省略句。

参考译文:同时,科学家们发表文件声明,现代杀虫剂的使用对人体有绝对的、长期的影响,这就意味着,虽然有机食品不会对我产生危害,但是它们也不会像你所想的那样有那么多益处。

2. Quercetin and kaempferol are members of a larger group of antioxidants known as flavonoids, which when consumed in foods have been associated with reduced risks of chronic health conditions like heart disease, certain cancers and even some forms of dementia.

结构分析:本句是一个复合句。主句是 Quercetin and kaempferol... as flavonoids;known as flavonoids是过去分词短语作后置定语,修饰 a larger group of antioxidants;which引导一个非限定性定语从句;when引导一个时间状语从句。

参考译文:橡黄素和山酚是被称为类黄酮的抗氧化剂中的两种,富含类黄酮的食物能减少人们患某些慢性疾病的风险,如心脏病、癌症和一些痴呆症。

坚持 源于毫不怀疑自己的价值

同时相信结果源于每次努力的积累

只要三步

骤如下

阅读全文 购买2019最新题源报刊课程