Besides providing a perfect environment for sea plants and animals to live in, seawater has other values, one of which is that it constantly moves, and its movements produce energy.

The most obvious movements are the waves and the tides. Winds cause the waves, and the gravitational pull of the moon and the sun causes the tides. In places like the Bay of Fundy in Canada, the difference between the high and low tide level can be as much as 40 feet.

France and Britain are now trying to use energy in the tides to produce electricity. Waves can produce electricity and some experiments are taking place to learn more about this. One of the most encouraging areas of research uses the difference between the temperature of seawater at the surface and deep down to produce electricity. 

Waves and tides are caused by ________ .

A. the same forces    B. different forces     C. their own movements     D. plants and animals

It can be inferred from the passage that __________ .

A. waves as well as the energy in the tide can produce electricity   

B. the highest tide is 40 feet higher than the lowest one at the sea

C. many countries in the world have made the most of energy produced by seawater

D. it is being tried in some developed countries to use energy in the tides to produce electricity      

The best title for the passage is ______.

A. Tides and Waves    B. How to Produce Electricity     C. Seawater     D. Another Cheap Energy

【小題1】B【小題1】D【小題1】A


解析:

略

練習冊系列答案
相關習題

科目：高中英語 來源： 題型：閱讀理解

認真閱讀下面短文，并根據(jù)所讀內(nèi)容在文章后圖表中的空格內(nèi)填入最恰當?shù)脑~。

 注意：每空一詞。

Ten is not just a number. For Hong Kong, it means change. That change began 10 years ago on July 1, 1997, when Hong Kong was returned to the mainland. A year later, putonghua became a major subject in middle schools there. Street chatter now is trilingual: Cantonese, English and putonghua.

But language is just one of the many changes. Over the past 10 years, the flow of people has left its mark, especially on the young people.

The first sign is in the job market. Before 2006, about 10,000 young professionals from the mainland found jobs in Hong kong. At the same time, around 240,000 Hong Kong residents had worked or were working on the mainland. More than 60 percent of them were aged 23 to 25, according to official statistics.

Geng Chun, 26, a native of northern China, managed to start his own IT business after completing his university degree in Hong Kong three years ago.

“I like Hong Kong,” Geng said. “Hong Kong needs us. We’re young, well-educated and energetic.”

Education is the next thing to change. After the return, more people from both the mainland and Hong Kong began crossing the border to get an education.

According to China’s Ministry of Education, in 2006, 914 Hong Kong students were admitted to mainland universities. In all, 7060 studied in the mainland that year. Before that time, Hong Kong students were rarely seen in mainland schools.

There was a growth on the other side as well. In the early 1990s, about 100 mainland students went to Hong Kong every year to study. Last year, 1300 studied in Hong Kong universities.

Besides social and cultural changes in Hong Kong, business exchanges between the mainland and Hong Kong have greatly increased.

 According to a Xinhua report, by the end of 2006, the mainland’s total investment in Hong Kong had reached $40 billion since 1997, which makes up 57 percent of all investments to places outside the mainland.

“We have many clients from the mainland, and actually, they are becoming our biggest group of clients,” said Ho, a manager for a Hong Kong PR company. “The mainland has provided our company with more business opportunities, which are vital for our development.”

Ten Years Reshapes Hong Kong

 

(1)_______________

Putonghua is

a.       a major (2)________________ in middle schools;

b.       heard in street (3)____________________.

 

(4)_______________

Market

a.       Hong Kong employs about 10,000 young (5)________________ from the mainland .

b.       More Hong Kong residents go to work on the mainland.

 

(6)_______________

More students from the mainland study in Hong Kong. The number was (7)____________ in 2006. Also more Hong Kong students go to the mainland for study.

 

(8)_______________ exchange

a.       From 1997 to 2006, the mainland altogether (9)_______________ $4 billion in Hong Kong.

b.       The mainland has provided more business (10) ________________ for Hong Kong companies.

查看答案和解析>>

同步練習冊答案