Passage 13

汉语常被认为是一种非常古老的语言。从某种意义上说，这种说法不免失之偏颇。人类所有的语言都可追溯到朦胧的史前时期，但目前我们还无法确定这些语言是否都同宗同源。//五千年前华夏祖先说汉语的方法同英语人士的祖先说英语的方式大致相似。而从另一种意义上说，汉语确实也是一种很古老的语言。今天所存留下来的最早的汉字已有近四千年的历史 .// 这些文字均为甲骨雕文。大部分铭文为神谕圣旨，内容大都与政治事件和宗教活动有关，有些则是关于天气和战争的记录。// 汉语有丰富的古代文字作品，源远流长，远非其他一种语言的文字可与之媲美。一些最古老的文字属象形文字。//

Chinese is often termed a very old language. In a sense such a statement is misleading. All human languages go back to the dim uncertainty of prehistory， ａｎｄ　at present we have no way of knowing fｏｒsure whether ｏｒnot they can all be traced back to the same root.// Five thousａｎｄ　years ago the ancestors of Chinese people spoke an early form of Chinese language in much the same way that the ancestors of English-speaking people were using an early form of the English language. In a sense， however， Chinese is indeed a very old language. The earliest written forms of Chinese in existence today date back nearly 4，000 years.// These writings are incisions on bones ａｎｄ　tortoise shell. Most of the inscriptions are oracular， dealing mostly with political ａｎｄ　religious events， ｏｒwith weather ｏｒwarfare.// Chinese has an abundance of ancient writings that reach back continuously in time further than the writings of any other language in the world. Some of the earliest written Chinese characters were quite pictographic.//

Passage 14

我们都知道信息存储、传输和处理是提高社会整体发展水平的最重要的保障条件之一，也是世界各国高技术竞争的焦点之一。但并非每一个人都知道，世界上最重要的信息是人类基因组提供的信息。//人类基因组蕴含着人类生、老、病、死的绝大多数遗传信息，破译这些信息将会在疾病的诊断、新药物的研制、新疗法的探索等领域引发一场革命。//一些科学家认为，破译人类遗传密码的重要性不亚于人类登月的“阿波罗计划”。人类基因组图谱及初步分析结果的公布，对生物科学和生物技术的发展起着重要的推动作用。// 我们确信的是，35 亿年前高度复杂的分子DNA 就出现了。DNA 是地球上所有生命的基础，它有着像螺旋式楼梯一样的双螺旋结构。//

We all know that information storage， transmission ａｎｄ　processing constitute some of the most important guarantee conditions fｏｒenhancing the level of overall social development， as well as a focal point in the competition of high technologies between various countries. But not everyone realizes that the most significant information reservoiris no other than the human genome.// The human genome contains most of the hereditary information related to the birth， aging， diseases ａｎｄ　death of humankind. Its decoding will bring about a revolution to the diagnosisof diseases， to the development of new medicines ａｎｄ　to the exploration of new therapies.// Some scientists believe the work to decipherthe human genetic code is no less important than the Apollo moon landing program. The publication of the map ａｎｄ　preliminary conclusion of the human genome played an important role in promoting the development of life science ａｎｄ　biotechnology.// What we do know is that by three ａｎｄ　a half billion years ago the highly complicated moleculeDNA had emerged. DNA is the basis of all life on earth. It has a double helixstructure， like a spiral staircase.//

Passage 15

几千年来我们中国人一直视筷子为一种可以将饭从碗中逐口送入口中的最简单同时也是最有效的工具。早在周朝时期，筷子便被人们用来夹取荤、蔬菜，而米饭在那时则用手来取食。//全国各地的筷子大小基本一样，而所用的材料的种类则各有不同，所选材料有竹子、木材、漆器、玉石、象牙、塑料、铝、银、金等。特长的竹筷通常用于厨房中。//中国人使用筷子的方法很有艺术性，各人有各人的方法，就好像签名一样，不尽一致。中国人一般都能随心所欲的用筷子夹起一粒米饭，一粒豌豆，一只滑溜溜的蘑菇或海参。// 使用筷子时，要把一双筷子夹在大拇指和食指之间。要点是让其中的一根筷子保持不动，活动另一根筷子，以便能像钳子一样夹取食物。//

Fｏｒthousands of years we Chinese have always regarded chopsticks the simplest possible ａｎｄ　the most efficient tool fｏｒtransporting bite-sized morsels of food form a bowl to the mouth. As early as in the Zhou Dynasty， chopsticks were used fｏｒpicking up meat ａｎｄ　vegetables， while hands were used fｏｒrice.// Chopsticks， which are roughly uniform in size throughout China， can be made of a variety of materials， including bamboo， wood， lacquer， jade， ivory， plastic， aluminum， silver ａｎｄ　gold. Special long bamboo chopsticks are generally used in the kitchen.// The way we Chinese handle our chopsticks is quite artistic ａｎｄ　varied from person to person like one\'s signature. An average Chinese can very easily pick up a single tiny grain of rice， ｏｒa tiny piece of peas， ｏｒa slippery button mushroom ｏｒsea cucumber.// When using chopsticks， one should place both sticks between the thumb ａｎｄ　forefinger. The point is to keep one stick still ａｎｄ　move the other so as to make them work like pincers.//