问题 综合

《北京晚报》2004年11月10日报道:“从北京天文馆得知,最近太阳活跃的程度不仅是千年来首见,甚至是8000年来最活跃的。德国普朗克实验室的SamiSolanki等人预测,这样的黑子活动高峰,将会反常地维持一段很长的时间,可能会有50年之久。”:回答:

(1)通常太阳黑子的活动周期平均约为________年,但并不一定,有时会有差异。

(2)太阳活动对地球的影响很大,世界各国都十分重视对太阳活动的观测和预报。

根据所学知识,你认为下列哪些部门应格外重视太阳活动预报(    )

A.通信部门

B.航天部门

C.冶金工业部门

D.气候研究部门(3)地理知识很丰富的高中生张明读了这则消息后,忧喜参半,喜的是可以进行黑子峰年的天文观测,那让他担忧的是什么?为什么?

答案

(1) 11  (2) ABD   (3) 张明担心的是:太阳活动对地球的不利影响如扰动电离层--影响通信、产生磁暴--指南针不能正确指示方向等。原因:当太阳黑子和耀斑增多时,其发射的电磁波进入地球电离层,会引起电离层扰动,使地球上无线电短波通信受到影响,甚至出现短暂的中断。太阳大气抛出的高能带电粒子会扰乱地球磁场,产生磁暴,导致罗盘磁针剧烈颤动,不能正确指示方向。(其它不利影响也可答上)。

联系实际考查太阳活动对地球的影响。黑子活动周期平均为11年,有时会有差异。因太阳活动能影响气候(降水)、扰动电离层等,所以通信、航天、和气候研究部门会格外重视太阳活动预报。太阳活动对地球的不利影响正是张明所担忧的。

填空题
阅读理解

阅读理解。

     Thousands of people living in the Chinese capital will celebrate the start of the Chinese New Year by

heading for the ski resorts (滑雪场). Never mind that Beijing's dry weather seldom produces snow. It is

cold enough in winter for snow-making machines to make a covering for the hills north to the capital.

And the rapid growth of a pleasure-seeking middle class has formed the basis for this new craze (热潮).

     Since Beijing's first ski resort was opened ten years ago, the sport has enjoyed an Astonishing increase.

There are now more than a dozen resorts. Clothes markets in the city have added bright colored ski suits

to their winter collections. Mr Wei, a manager of a newly-opened ski resort in Beijing, sees the growth of

an industry that could soon lead Chinese to head for the ski resorts of Europe. In recent years ski resorts

offering natural snow have opened in China. But many are in faraway areas of the country and can't really

match the equipment and services of some ski resorts in Europe.

     Beijing's skiing craze is partly a result of the recent increase in private (私有的) cars. This has led to

the growth of a leisure industry in the capital's suburbs, which until the late 1990s were unreachable to

ordinary people. According Mr Wei, about 40% of the visitors to his resorts come in their own cars. The

rest are bushed in by schools, businesses or government offices.

     The problem is making money. Starting ski resorts requires quite a lot of money: hiring land from the

local government, preparing the hills, buying snow machines, making sure there are enough water and

electricity to run them, and buying ski equipment for hiring out to customers. The ski resort where Mr

Wei works cost nearly $4m to set up. And as so often in China when someone comes up with a good idea,

many others rush in and price wars break out. Beijing now offers some of the cheapest ski training classes

in the world, though with most people rather new to the sport, expecting a few more doing the same job.

1. What does this text mainly talk about?[ ]

A. Convenience for skiers brought about by private cars.

B. Skiing as a new way of enjoying one's spare time.

C. Things to be considered when starting a ski resort.

D. A sudden increase of ski training classes in Beijing.

2. Why are some Chinese likely to go skiing in Europe?[ ]

A. To visit more ski areas.

B. To ski on natural snow.

C. For a large collection of ski suits.

D. For better services and equipment.

3. The underlined words"leisure industry" in Paragraph 3 refer to _____. [ ]

A. transport to ski resorts

B. business of providing spare time enjoyments

C. production of family cars

D. part-time work for people living in the suburbs

4. What is the main problem in running a ski resort?[ ]

A. Difficulty in hiring land.

B. Lack of business experience.

C. Price wars with other ski resorts.

D. Shortage of water and electricity.