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2017年10月21日 21:56:49来源:快乐中文

人类的智力基因显而易见在人体DNA内和注入卷心菜DNA后的作用是不同的但将它植入卷心菜中会产生什么样的副作用呢?换句话说,食用转基因食品安全吗?没有人知道,因为人们尚未进行长期的测试Is Gm Food1) Safe To Eat?Traditional plant breeding involve s crossing varieties of the same species in ways they could cross naturally. example,disease-resistant) varieties of wheat have been crossed with high-yield wheat to combine these properties.This type of natural gene exchange is safe and fairly predictable3).Genetic engineering(GE)involves exchanging genes between unrelated species that cannot naturally exchange genes with each other.GE can involve the exchange of genes between vastly different species――e.g.putting scorpion) toxin5) genes into maize6) or fish antifreeze7) genes into tomatoes.It is possible that a scorpion toxin gene,even when it is in maize DNA,will still get the organism to produce scorpion toxin――but what other effects may it have in this alien environment?We are aly seeing this problem――adding human growth hormone genes to pigs certainly makes them grow――but it also gives them arthritis and makes them cross-eyed,which was entirely unpredictable.It will be obvious, example,that the gene human intelligence will not have the same effect if inserted into cabbage DNA as it had in human DNA――but what side-effect would it have?In other words,is GM food safe to eat?The answer is that nobody knows because long-term tests have not been carried out.Companies wanting a GM product approved in the UK or USA are required to provide regulatory bodies with results of their own safety tests.Monsanto’s soya beans were apparently fed to fish weeks bee being approved.There was no requirement independent testing, long-term testing, testing on humans or testing specific dangers to children or allergic8) people.The current position of the UK Government is that“There is no evidence of long-term dangers from GM foods.”In the US,the American Food and Drug Administration is currently being prosecuted9) covering up research that suggested possible risks from GM foods. 68。

  • 常用英语口语之举行宴会 -- 18:19: 来源: 常用英语口语之举行宴会1.I'm very glad to have the opporty to meet them.我很高兴有机会同他们会面.When will it be held?宴会什么时候举行?3.I'll be there on time.我会时到的.I'll come you at 6:00 this evening. Will that time suit you?我今晚六点钟来接您那时您有空吗?5.Thanks a lot having us. We had a good time.真感谢你邀请我们来我们玩得很愉快6.It's a successful party.这是一个很成功的宴会7. Did you get Judy's invitation?你收到朱迪的邀请函了吗?8. We're having more guests than we expected.今天的来宾比我们预料得多9. I ask you to join me in drinking to the future success of ofcooperation.请您和我一起举杯庆祝我们共同合作愉快. Which hotel will the reception be held at?婚宴定在哪个酒店?. Let's sing .Happy Birthday" to Nancy.让我们大家一起为南希唱《生日快乐. We are meeting here at about six o'clock.我们打算六点在这里碰面 常用英语口语。
  • The Things Kids Say One summer evening during a violent thunderstorm1) a mother was tucking her small boy into bed.She was about to turn off the light when he asked with a tremor) in his voice,“Mommy,will you sleep with me tonight ?”The mother smiled and gave him a reassuring3) hug. “I can' t,dear.” She said.“I have to sleep in Daddy's room.”Along silence was broken at last by his shaky little voice:“The big sissy).” 90。
  • Botany Botany, the study of plants, occupies a peculiar position in the history of human knowledge. many thousands of years it was the one field of awareness about which humans had anything more than the vaguest of insights. It is impossible to know today just what our Stone Age ancestors knew about plants, but from what we can observe of preindustrial societies that still exist a detailed learning of plants and their properties must be extremely ancient. This is logical. Plants are the basis of the food pyramid all living things even other plants. They have always been enormously important to the welfare of people not only food, but also clothing, weapons, tools, dyes, medicines, shelter, and a great many other purposes. Tribes living today in the jungles of the Amazon recognize literally hundreds of plants and know many properties of each. To them, botany, as such, has no name and is probably not even recognized as a special branch of "knowledge"at all. Untunately, the more industrialized we become the farther away we move from direct contact with plants, and the less distinct our knowledge of botany grows. Yet everyone comes unconsciously on an amazing amount of botanical knowledge, and few people will fail to recognize a rose, an apple, or an orchid. When our Neolithic ancestors, living in the Middle East about , 000 years ago, discovered that certain grasses could be harvested and their seeds planted richer yields the next season the first great step in a new association of plants and humans was taken. Grains were discovered and from them flowed the marvel of agriculture cultivated crops. From then on, humans would increasingly take their living from the controlled production of a few plants, rather than getting a little here and a little there from many varieties that grew wild - and the accumulated knowledge of tens of thousands of years of experience and intimacy with plants in the wild would begin to fade away. 15989。
  • February 7 Threepenny DayA number of English gentlepersons managed to create a holiday by means of wrought1) bequests) in their wills. One of these was Provost Bost, administrator of the public school, Eton. Upon his death in , it was revealed that Bost had willed a sum of money that was earmarked3) to provide tuppence) a year in perpetuity5) each of Eton’s “collegers.” (Collegers are boarding students whose families live far away;the remainders are town boys or “oppidans6).”) The money was to ensure that the boys would get enough to eat. At the time of Bost’s death, tuppence bought nearly half a sheep, and it was an Eton tradition, dating back to the reign of Henry VI, that collegers were to be fed no meat except mutton. Provost Lupton, Bost’s successor, added his own posthumous7) bequest to the original charity so that the annual dole8) would amount to thruppence. Every February 7, the collegers gather――a dignified cadre of jackets, vests, and ties――in College Hall the Threepenny Ceremony. Each boy in turn plucks his threepence from the crown of a tall silk hat. As consideration the gift, each boy must recite a prayer Bost’s soul. 198。
  • 担心与忧虑Part-对话详解及文化洗礼 -- :56: 来源: 详解实用对话WorryRose:Has Alan shown up? yet?Jack:No, not yet. I guess something came up?. He’ll call soon enough to let us know what’s going on. He’s good that way.Rose:I wonder what it could be.Jack:I don’t know. I hope it’s nothing serious.Rose:Last week his sister was admitted to the hospital.Jack:What happened?Rose:She was in a serious car accident. She was hurt pretty badly. They thought she was going to die.Jack:How is she now?Rose:She fell into a coma?... The doctors aren’t too hopeful. But I hope they’re wrong.Jack:Poor? Alan. He’s going nuts. His sister is all he has left; his parents died last year.Rose:Yes, he has been through a lot in the last year. I hope his luck changes soon. Maybe his sister will pull through?.担 忧罗丝:艾伦露面了吗?杰克:没有,还没露面我猜肯定发生什么事了他应该会打电话告诉我们的要是那样就好了罗丝:我在想会是什么事杰克:我也不知道希望不是什么严重的事情罗丝:上星期他住院了杰克:怎么回事啊?罗丝:他出了车祸,伤得很严重他们都觉得她快不行了杰克:那她现在怎么样?罗丝:她已经昏迷了医生觉得没有太大希望了不过我希望他们的判断是错的杰克:可怜的艾伦他都快要发疯了他可是他惟一的亲人了,他父母去年刚去世罗丝:是啊,他去年经历得太多了我希望他能时来运转也许他能挺过来呢详细解说“show up”的意思是“露面,出席”,例如:Uncle George didn't show up our wedding because he got. (乔治叔叔没有来参加我们的婚礼,因为他忘了)“come up”的意思是“发生”,例如:I'll let him know if anything comes up. (如果发生什么事,我会告诉他的)“fall into a coma”意为“陷入昏迷状态”单词“poor”在对话中的意思是“可怜的”,例如:How's your poor father? (你可怜的父亲怎么样了?)另外“poor”还可以表示“贫穷的”,例如:My family used to be poor. (我家过去很穷)“pull through”的意思是“度过难关,恢复健康”单 词wonder v. 想知道, 对…感到惊讶admit v. 接纳, 允许进入accident n. 意外事故hurt v. 伤害,(使) 受伤,(使)  疼痛coma n. 昏迷FUN 轻松:贴士寻找中国人错误英语的根源英国语言学家艾利斯认为母语干扰是导致第二语言学习者出现错误的主要原因母语干扰主要表现为负向迁移,即学习者在一种语境中学会的知识会干扰在另一种语境中的学习中国学生学英语也是如此英汉两种语言的文化背景、表达习惯、句型结构以及词汇的运用等方面各不相同,所以中国的英语学习者因受汉语的影响,经常会说出一些“中国式英语” 详解 对话 文化 口语。
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