The Maryland Science Center is more than fun. You can enjoy the three floors of exciti

第1题

The Maryland Science Center s more than fun. You can enjoy the three floors of exciting th

ings, watch the larger-than-life play on the 4th floor, and travel to other worlds, to far away stars, on the 5th floor.

Don' t just look. You are expected to feel, to turn, to push. Build your own house and earn why t stands or falls. Use computers to work out plans just as famous scientists have done. There s always something new to learn at the Maryland Science Center.

Children and group visitors enjoy half price.

The excitement of the Maryland Science Center does not end when you leave. Visit the Science Store for a gift you' d like to keep. Electronic jewelry(电子珠宝), games, books, and more — take part of the Science Center home with you.

Information

Where to call:

24 hour general(常规的) information(410)685-5225

24 hour STARLINE night, sky information (410)S39-STAR

Group visitor information (410) 685-2370

Hours:

The Maryland Science Center is open 7 days a week(except Thanksgiving Day and Christmas

Day)

Monday-Friday 10 a. m.-p. m

Saturday and Sunday 10a.m.-p.m.

Whacan visitors do at the Maryland Science Center？

A．Learn science by trying it out.

B．Watch and take part in a play.

C．Make gifts for their friends.

点击查看答案

第2题

By the mid-nineteenth century, the term "ice-box" had entered the American language, but i

ce was still only beginning to affect the diet of ordinary citizens in the United States. The ice trade grew with the growth of cities. Ice was used in hotels, taverns, and hospitals, and by some forward-looking city dealers in fresh meat, fresh fish, and butter. After the Civil War (1861- 1865), as ice was used to refrigerate freight cars, it also came into household use. Even before 1880, half the ice sold in New York, Philadelphia, and Baltimore, and one-third of that sold in Boston and Chicago, went to families for their own use. This had become possible because a new household convenience, the ice-box, a precursor of the modern refrigerator, had been invented. Making an efficient ice-box was not as easy as we might now suppose. In the early nineteenth century, the knowledge of heat, which was essential to a science of refrigeration, was rudimentary. The commonsense notion that the best ice-box was one that prevented the ice from melting was of course mistaken, for it was the melting of ice that performed the cooling. Nevertheless, early efforts to economize ice included wrapping the ice in blankets, which kept the ice from doing its job. Not until near the end of the nineteenth century did inventors achieve the delicate balance of insulation and circulation needed for an efficient ice-box.

But as early as 1803, an ingenious Maryland farmer, Thomas Moore, had been on the right track. He owned a farm about twenty miles outside the city of Washington, for which the village of Georgetown was the market center. When he used an ice-box of his own design to transport his butter to market, he found that customers would pass up the rapidly melting stuff in the tubs of his competitors to pay a premium price for his butter, still fresh and hard in neat, one-pound bricks. One advantage of his ice-box, Moore explained, was that farmers would no longer have to travel to market at night in order to keep their produce cool.

What is the main idea of this passage？

A．The influence of ice on the diet.

B．The transportation of goods to market.

C．The development of refrigeration.

D．Sources of the term "ice-box".

点击查看答案

第3题

Where does Landau live？ A．Washington, DC B．Manhattan, New York City C．Baltimore, Marylan

d D．White House

点击查看答案

第4题

Paragraphs 2 and 3 are written to ______.A．discuss the cause of the decline of science's p

Paragraphs 2 and 3 are written to ______.

A．discuss the cause of the decline of science's power

B．show the author's sympathy with scientists

C．explain the way in which science develops

D．exemplify the division of science and the humanities

点击查看答案

第5题

According to the author, the popular image of science fiction is______.A．prejudicedB．impar

According to the author, the popular image of science fiction is______.

A．prejudiced

B．impartial

C．worthy

D．admiring

点击查看答案

第6题

The book the author was reading was ______.A．an ordinary book about scienceB．a science boo

The book the author was reading was ______.

A．an ordinary book about science

B．a science book on sound

C．a science story-book about strange creatures on a certain heavenly body

D．a book on how to play tricks on others

点击查看答案

第7题

How often is physical science more accurate than biological science？A．Never.B．Always.C．Usu

How often is physical science more accurate than biological science？

A．Never.

B．Always.

C．Usually.

D．Occasionally.

点击查看答案

第8题

The author does not include among the science the study of ______.A．AstronomyB．LiteratureC

The author does not include among the science the study of ______.

A．Astronomy

B．Literature

C．Chemistry

D．Economics

点击查看答案

第9题

The author's attitude toward the issue of "science vs. anti-science" is ______.A．impartial

The author's attitude toward the issue of "science vs. anti-science" is ______.

A．impartial

B．subjective

C．biased

D．puzzling

点击查看答案

第10题

Sociology had its beginnings as a separate science with ______.A．ComteB．SpencerC．LatinD．Da

Sociology had its beginnings as a separate science with ______.

A．Comte

B．Spencer

C．Latin

D．Darwin

点击查看答案

第11题

In our present world, ______.A．science develops as fast as it is predicted by science fict

In our present world, ______.

A．science develops as fast as it is predicted by science fiction writers

B．science develops faster than writers can imagine

C．science fiction writers can always foresee what wonders science can do

D．only science fiction writers can see the way science is going

点击查看答案