瓶装乙炔气与乙炔发生器相比具有哪些显著优点?

失业和就业的基本概念是什么？

Part V Writing

写作指导

这是一篇描写文 (Description)。用通俗的话说，描写文就是用文字给人物、地点、景物画象。一篇描写文主要是通过所感受的细节——所见所闻发展而来的。在写人 时，不仅仅要用细节描写其外貌，而要注重通过他的言行来表现其人物性格、思想和品德，更要抓住他区别于他人的性格特点，这样就容易给读者留下深刻的印象。短文的第一、二段叙述故事发生的时间、地点，故事发生的原因及故事所涉及的人物。文章的三、四、五段描写的是人物的外貌，穿着及性格特点。通过对人物言行 的简单描写来揭示主人翁的助人为乐的高尚精神。短文的最后一段，要用一句话概括作者对主人翁的看法： A good guy。文章有描述，有议论，要加叙加议，有血有肉，上下文连贯要紧密，首尾要呼应，人和事要给人们留下深刻印象。

Part IV Translation

Yet these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful. (Passage Two)

翻译训练：

筷子(chopsticks) 是中国传统的独具特色的进食工具 (diningutensils) ，至今已有数千年的历史。筷子在古代被称为“箸”，大约从明朝开始才有了 “筷子”的称呼。筷子多为竹子制成，也有用木头、象牙(ivory)、金属或其他材料制作而成。它要么上方下圆，要么上下全圆而上粗下细。不管其形状如何，筷子必须是成对使用的，并且两只筷子的大小长短要相同。筷子是中国人日常生活的必备工具，它的发明充分反映了中国人民的智慧。

翻译：

中华民族的传统文化博大精深、源远流长。早在2 000多年前，就产生了儒家学说和道家学说，以及其他很多在中国思想史上有地位的学说流派，这就是有名的“诸子百家”。从孔夫子到孙中山，中华民族传统文化有它的很多珍贵品质。比如“天下兴亡，匹夫有责”的爱国情操，“民为邦本”、“民贵君轻”的民本思想和“己所不欲，勿施于人”的行为准则。

Part I Reading Comprehension

Passage 1

Questions 1 to 5 are based on the following passage:

In Washington D.C., 1600 Pennsylvania Avenue is a very special address. It is the address of the White House, the home of the president of the United States.

Originally the White House was gray and was called the Presidential Palace. It was built from 1792 to 1800. at this time, the city of Washington itself was being built; it was to be the nation’s new capital city. George Washington, the first president, and Pierre Charles L’Enfant, a French engineer, chose the place for the new city. L’Enfant then planned they city. The president’s home was an important part of the plan.

A contest was held to pick a design for the president’s home. An architect named James Hoban won. He designed a large three-story house of gray stone.

President Washington never lived in the President Palace. The first president to live there was John Adams, the second president of the United States, and his wife Mrs. Adams did not really like hew new house. In her letters, she often complained about the cold. Fifty fireplaces were not enough to keep the house warm!

In 1812 the United States and Britain went to war. In 1814 the British invaded Washington. Theu burned many buildings, including the Presidential Palace.

After the war James Hoban, the original architect, partially rebuilt the president’s homes. To cover the marks of the fire, the building was painted white. Before long it became known as the White House.

The White House is one of the most popular tourist attractions in the United States. Every year more than 1.5 million visitors go through the five rooms that are open to the public.

1. The White House was built in Washington .

A. because a French engineer was invited to design it

B. because President George Washington liked to live in it

C. because the British invaders lived in it in 1812-1814

D. because it was to be the nation’s capital city

2. The Presidential Palace was .

A. painted gray and white B. made of gray stone

C. made of white stone D. made very warm in winter

3. The president’s home and the city of Washington were .

A. built by the American army B. built by the British troops

C. planned by George Washington D. planned by the French

4. The original home of the president needed to be rebuilt .

A. because John Adam’s wife did not like it

B. because it was cold in winter even with 50 fireplaces

C. because it had burned down during the war

D. because George Washington was not willing to live in it

5. The new presidential home was painted white to .

A. cover the marks of fire B. attract tourist from France

C. to please Mrs. John Adams D. keep it warm in winter

翻译：

最近，一些地方大学开始将方言列为某些学生的必修课程，学生们要学习当地方言，然后被评分以作为毕业的依据之一。一方面，支持此种做法的人认为，将方言列为必修课可防止其消失，从而使当地传统文化和文化多样性得以弘扬，同时城市独特的个性得以保留。另一方面，反对此种做法的人争论说，当地学生与外地学生相比有很多绝对优势，因此将方言列为必修课会引起教育不公平的问题。而且，将方言列为必修课程还会引起一些其他问题，如教材使用、师资问题和考试标准等。在我看来，方言作为传统文化不可缺少的一部分和一种交流工具，可以让学生自愿学习和使用，而不是强制完成。

用于混凝土、砌筑砂浆的常用水泥、用于砌筑砂浆的砌筑水泥及抹灰用水泥，它们的必试项目有什么不同?

对归档程序的要求有哪些?