帮忙找一下介绍西方的英语短文
Certain fungi and even some kinds of bacteria secrete substances known as antibiotics into their environment. These substances are capable of killing or inhibiting the growth of various kinds of bacteria that also occupy the area, thereby eliminating or reducing the competition for nutrients. The same principle is used in defense against invaders in other groups of organisms. For example, when attacked by disease-causing fungi or bacteria, many kinds of plants produce chemicals that help to ward off the invaders.
Members of the animal kingdom have developed a variety of defense mechanisms for dealing with parasites. Although these mechanisms vary considerably, all major groups of animals are capable of detecting and reacting to the presence of "foreign" cells. In fact, throughout the animal kingdom, from sponges to certain types of worms, shellfish, and all vertebrates (creatures possessing a spinal column), there is evidence that transplants of cells or fragments of tissues into an animal are accepted only if they come from genetically compatible or closely related individuals.
The ability to distinguish between "self' and " nonself”, while present in all animals, is roost efficient among vertebrates, which have developed an immune system as their defense mechanism. The immune system recognizes and takes action against foreign invaders and transplanted tissues that are treated as foreign cells.
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想了解西方历史看什么书比较好要详尽的
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急!!什么叫西方文化?
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西方传说有什么?
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西方国家的主要城市和象征
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西方的节日中英文介绍
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西方文化有那些?
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超高分求一个西方故事
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西方万圣节英文介绍
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谁能为我详细地介绍一下西方的Bachelor party(急,在线等)
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有没有西方众多古神的资料?
罗马人对这些神灵采取了一种非常恭敬、虔诚的态度,一家之父的职责就是充当家庭祭师,主持抚慰众多守护神的仪式。这些仪式包括日常祈祷、烧香以及饮奠酒,但到忙时则只要念念诸神的名字以示崇拜就行了。随着罗马势力的扩展和巩固,国家采取措施对神灵的设置进行了整顿,将分散和设置上带有一定任意性的诸多...
爰炒保欣: 介绍美国的英语作文 The United States of America, also known as the United States, the U.S., the U.S.A., and America, is a country in North America that shares land borders with Canada and Mexico, and a sea border with Russia. Extending from ...
盐池县13784965828: 帮忙找一下介绍西方的英语短文 - ?
爰炒保欣: The livelihood of each species in the vast and intricate assemblage of living things depends on the existence of other organisms. This interdependence is sometimes subtle, sometimes obvious. Perhaps the most straightforward dependence of one ...
盐池县13784965828: 能帮忙找一篇关于国外饮食习惯、风俗、礼节等的英语短文吗?谢谢 - ?
爰炒保欣: 这是一篇关于西方礼节的文章,希望对你有所帮助. In western countries, the general rule of making introductions is: to introduce the young to the old; to introduce the man to the woman;and to introduce junior to senior.But in business circles,the ...
盐池县13784965828: 找2 篇关于西方习俗的英语文章 - ?
爰炒保欣: For today's Christian, the origin of Christmas is, and should be, the birth of Jesus Christ as recorded in the Bible. Nothing more and nothing less. However, most of what we witness on December 25th each year has absolutely nothing to do with that ...
盐池县13784965828: 求描述西方节日的英语文章共5篇,有一篇发一篇 - ?
爰炒保欣:[答案] Once again , it's Christmas . Christmas is on every December 25th . Chrstmas is a day that we give and get presents . Father Christmas also gives gifts to children on this speacial day in the year . For decoration , people usually decorats the house with...
盐池县13784965828: 介绍英美风情的英文版短文 - ?
爰炒保欣: Westerners tend to be analytical and pay more attention to the key ,or focal objects in a scene--for example,concentrating on the woman in the "Mona Lisa",as opposed too the rocks and sky behind her.西方人倾向于分析问题,更加注意某一现场的关键或焦点问题——例如他们会更加留意蒙娜丽莎本人,而非她后面的岩石和天空 .{摘自英语通}其实你看一下各种英语杂志就不难找到
盐池县13784965828: 介绍西方家庭聚会的英语作文? - ?
爰炒保欣: conversations steadily got shorter, and she seemed to lose interest in listening and in talking. She didn't say it, but you could tell she was in a lot of pain.” Mrs. Allen said she hadn't even talked to either of the Vittorios in almost a year. They ...
盐池县13784965828: 求英语短文 西方的习俗?
爰炒保欣: typically,family and friends gather together on Christmas Eve,on Dec 24,for a big turkey dinner,completed with Christmas pudding(a rich cake with brandy source).Everyone shares their stories of the year or brings a newsletter to read out for what ...