Key told the meeting of the charity cancer Research uK 10 other elements of diet linked to cancer are 11 unknown but scientists are hoping that the EPIc study, which isparing the diets of 500,000 people in 10 countries and their risk of cancer, will provide some 12 .
Early results of the study have revealed that Norway, Sweden and Denmark have the 13 consumption of fruit and vegetables among European countries while Italy and Spain have the highest. Eating at 14 five portions of fruit and vegetables a day is rmended to reduce the risk of cancer.
Key, principal scientist on the EPIc study, said it is looking at dietary links to some of the mostmon cancers 15 colorectal, breast and prostate.
饮食，酒精与大约三分之一的癌症有关 (c)
一位重要的研究者在星期二说，饮食是仅次于吸烟的导致癌症的原因，在发达国家饮食和酒精导致了大约三分之一癌症。
牛津大学的提姆•凯博士在癌症会议上说，科学家们正在研究特定的食物是怎样导致癌症的，但是他们知道，饮食、酒精和肥胖起了很大作用。
他说：“如果没有肥胖的人，癌症能够减少5%。”
然而吸烟和大约30%的癌症有关，饮食和大约25%的癌症有关，酒精和大约6%的癌症有关。
肥胖增加了乳腺、子宫、肠和肾脏得癌症的危险，而人们知道酒精会导致嘴、喉咙和肝脏的癌症。以上因素如果和抽烟共同发生，危险性就更大的。
凯在英国慈善癌症研究会议上说，人们还不知道与癌症相关的饮食中的其他因素，但是科学家们希望EPIc 研究能够给出答案。EPIc研究正在比较十个国家50万人的饮食和患癌症的比例。
这个研究的早期结果揭示挪威、瑞典和丹麦消费水果和蔬菜的量在欧洲国家中是最低的，而意大利和西班牙的水果和蔬菜消费量是最大的。专家推荐每天至少食用五份水果和蔬菜来减少得癌症、乳腺癌和前列腺癌。EPIc 研究的带头科学家——凯说他们现在正在关注饮食一些非常普遍的癌症之间的联系，包括直肠癌、乳腺癌和前列腺癌。
1. cause of …的原因
2. in developed countries 在发达国家
3. 标题指引
4. play a major role起主要作用
5. if 如果
6. 30 percent
7. in 平行结构
8. raise the risk 增加风险
9. its dangerous impact is increased 危险增加
10. that 从句
11. are still unknown仍然未知
12. provide some answers 提供一些答案
13. have the lowest consumption 最低消费
14. at least 至少
15. including 包括
one good Reason to Let Smallpox Live
It’s now a fair bet that we will never see the total extinction of the smallpox virus. The idea was to cap the glorious achievement of 1980, when smallpox was eradicated in the wild, by destroying the killer virus in the last two labs that are supposed to have it—one in the uS and one in Russia. If smallpox had truly gone from the pl, what point was there in keeping these reserves?
____1____reality, of course, it was naive to____2____that everyone would let____3____of such a potential weapon. undoubtedly several nations still have____4____vials.____5____the last “official” stocks of lice virus bred mistrust of the uS and Russia, ____6____no obvious gain.
Now American researchers have ____7____ an animal model of the human disease, opening the ____8____ for tests on new treatments and vaccines. So one again there’s a good reason to____9____the virus—just in____10____the disease puts in a reappearance.
How do we____11____with the mistrust of the uS and Russia? ____12____. Keep the virus ____13____ international auspices in a well-guarded uN laboratory that’s open to all countries. The uS will object, of course, just as it rejects a multilateral approach to just about everything. But it doesn’t____14____the idea is wrong. If the virus____15____useful, then let’s make it the servant of all humanity—not just a part of it.
一个让天花存在的好理由 (c)
目前很可能我们永远都不会看到天花的彻底绝迹。这个观念掩盖了1980年光辉成就，那时消灭了最后两个拥有这种致命病毒的实验室的病毒后，四处蔓延的天花已经被根除了。那两个实验室，一个在美国，一个在俄国。如果天花真的在这个星球上消失了，那么保留这些储备的意义何在?
当然，事实上想像每个人都会放弃这样一种有效的潜在的武器是幼稚的。无疑，几个国家仍旧有几瓶。美俄最后的“官方”的活病毒储备引起大家对这两个国家的不信任，因为并没有获得明显的收获。
现在美国研究者们发现了人类疾病的动物版，为试验新的治疗方法和新的疫苗开辟了道路。因此，再次存在着一个保存病毒的理由——万一这种病卷土重来。
我们怎样应付对美国和俄国的不信任呢?很简单。把病毒放在国际赞助的、被严密监视和向所有国家开放的联合国实验室中。针对的对象当然是美国，因为它反对任何事务的多边化。但是这并不意味着这个想法是错的。如果病毒是有用的，那么让我们把它变成全人类的奴仆——而不是一部分人的。
1. in reality 现实中
2. it was naïve to imagine 天真的想法
3. let go of 放弃
4. a few vials 几瓶
5. and 连接句子
6. for no obvious gain 因为没有明显的收获
7. have found a animal model 已经找到动物样本
8. open the way for 为…开辟道路
9. keep the virus 保存病毒
10. in case 以防万一
11. deal with 处理
12. Simple. (上下文含义)
13. under international auspices 在国际资助下
14. it doesn’t mean 并不意味着
15. if the virus is useful…如果病毒有用的话 www.gaofen123.com
三级文章(已考查)
charter Schools (B)
American public education has changed in recent years. one change is that increasing numbers of American parents and teachers are starting independent public schools called charter schools.
In 1991, there were 1 charter schools in the united States. Today, more than 2,300 charter schools 2 in 34 states and the District of columbia2. 575,000 students 3 these schools. The students are from 5 years 4 age through 18 or older.
A charter school is created by groups of parents, teachers andmunity members. It is similar 5 some ways to a traditional public school. It receives tax money to operate just as 6 .public schools do. The amount it receives depends 7 the number of students. The charter school must prove __ 8 __ local or state governments that its students are learning. These governments provide the school 9 the agreement, or charter that permits it to operate.
unlike a traditional public school, 10 , the charter school does not have to obey most laws governing public schools. Local, state or federal governments cannot tell it what to teach.
Each school can choose its own goals and decide the ways it wants to 11 those goals. class sizes usually are smaller than in many traditional public schools. many students and parents say teachers in charter schools can be more creative.
However, state education agencies3, local education-governingmittees and unions often 12 charter schools. They say these schools may receive money badly needed by traditional public schools. Experts say some charter schools are doing well while others are struggling.
congress provided 200 million dollars for establishing charter schools in the 2002 federal budget. 13 , often the schools say they lack enough money for their programs. many also lack needed space.
14 , many of the 36 charter schools in the District of columbia hold classes in crowded buildings. These schools have almost 11,000 students. District officials say they have provided 14 former school buildings 15 charter education. Yet, charter-school supporters say officials should try harder to find more space.
练习：
1. A not B little c no D none
2. A work B operate c carry on D open
3. A study B learn c attend D are educated
4. A of B at c on D about
5. A to B in c on D by
6. A another B else c other D others
7. A of B in c for D on
8. A for B to c with D by
9. A for B by c with D on
10. A moreover B however c besides D consequently
11. A arrive B hold c take D reach
12. A approve B oppose c praise D object
13. A And B Besides c Again D But
14. A As example B As an example c For example D For an example
15. A for B with c to D on
charter Schools
1. c 2. B 3. c 4. A 5. B 6. c 7. D 8. B 9. c 10. B
11. D 12. B 13. D 14. c 15. A
migrant workers (A)
In the past twenty years, there has been an increasing tendency for workers to move from one country to another. __ 1 __ some newly independent countries have understandably restricted most jobs to local people, others have attracted and weed migrant workers. This is particularly the case in the middle East,1 __ 2 __ increased oil ies have enabled many countries to __ 3 __ outsiders to improve local facilities. __ 4 __ the middle East has attracted oil-workers from the uSA and Europe. It has brought in construction workers and technicians from many countries, __ 5 __ South Korea and Japan.
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