河床式水电站的建筑物通常有拦河坝、进水口、调压室、厂房、变压器和开关等组成。

The Smiths are very busy. Mr. Smith is 60 and he has a lot of jobs. He is a postman, a car driver, a school-bus driver, a boatman, a salesman(售货员), a cook and a milkman. Also he and Margaret have a shop and a small hotel. Margaret is Mrs. Smith.

Mr. Smith lives and works on a small island(岛) in Canada. Only 120 people live on the island. But every summer about 150 people from other places come here on Mr. Smith’s boat every day. So Mr. Smith gets up at six and makes breakfast for the people in the hotel. At eight, he drives the island’s children to school.

At nine, he gives letters to all the houses on the island. He also gives milk to them. 然后他在商店里帮忙。He says, “Margaret likes to be busy, too. We are busy and we don’t like watching TV in the shop. I cook dinner and Margaret helps. At ten, we have some milk and then we go to bed. Some people may think our _______ is very boring, but we like it.”

小题1:There are only ______ people living on the island.

小题2:将文中汉语译成英语。 Then he _______________________.

小题3:文中空白处填入一个恰当的单词  _________

小题4:Mr. Smith has ______ jobs.

小题5:The Smiths are from ________.

如图所示，教室内两盏日光灯由一个开关控制. 以下电路中能反映它们正确连接的是

Throughout history, people have been interested in knowing how languages first began, but no one knows exactly where or how this happened. However, we do know a lot about languages, the languages of today and also the languages of earlier times. There are probably about 3,000 languages in the world today. Chinese is the language with the most speakers. English, Russian and Spanish are also spoken by many millions of people. On the other hand, some languages in the world have less than one hundred speakers.

There are several important families of languages in the world. For example, most of the languages of Europe are in one large family called Indo-European. The original (最初的) language of this family was spoken about 4,500 years ago. Many of the present day languages of Europe and India are modern forms of the language of 4,500 yeas ago.

Languages are always changing. The English of today is very different from the English of 500 years ago. In time some even died out completely. About 1,000 years ago, English was a little-known relative of German spoken on one of the borders of Europe.

If a language has a large number of speakers or if it is very old, there may be differences in the way it is spoken in different areas. That is, the language may have several dialects. Chinese is a good example of dialect differences. Chinese has been spoken for thousands of years by many millions of speakers. The differences between the dialects of Chinese are so great that speakers of Chinese from some parts of China can’t understand speakers from other parts.

1 The first paragraph mainly tells us that ____ .

A. most people in the world speak Chinese

B. there are thousands of languages in the world today

C. man has much knowledge about languages

D. some people know several languages

2 According to the passage, most European and Indian languages ____ .

A. will soon die out completely    B. were once a relative of English

C. are no longer spoken              D. come from the same family

3 According to the passage, ____ has the most speakers.

A. Chinese         B. English          C. Spanish          D. German

4 According to the passage, ____ seems to have changed a lot.

A. German         B. English          C. Spanish         D. Chinese

5The underlined word dialect in the last paragraph probably means ____ .

A. a special language spoken by Chinese

B. the sign used by the Chinese people in a special area

C. the difference between the old and today’s Chinese

D. the form of a language used in one part of the country

葡萄糖如何影响涉及糖代谢的操纵子表达

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