Today, ultrasonic(超声的) waves are being put to...

Today, ultrasonic(超声的) waves are being put to work in laboratories and factories. If an ultrasound generator is placed in a liquid, the waves move the liquid back and forthhundreds of thousands of times each second. This causes materials to mix quickly or to dissolve(使分解，使溶解) in liquids. Paint manufacturers(制造商) use ultrasound to do a better job of blending colors. The companies that make film for your camera find that mixing chemicals by the use of sound waves will produce a more sensitive film.

The new lightweight(轻量的) type of washing machine uses ultrasonic waves to get

clothes clean. Its special ultrasound generator is put into a pail of soapy water containing the soiled clothes. The sound waves drive the soapy water back and forth through the

cloth so fast that everything is soon clean. There is also a new kind of dishwasher that works in much the same way.

Ultrasonic waves can shake a liquid so fast that tiny holes form all through it. The

liquid is actually torn apart by this action. Almost as soon as these holes are made, they fall together again. The result is a powerful pounding action. In the dairy industry this is used for the double purpose of making homogenized(使均匀，使匀质) milk and sterilizing(使无菌) it at the same time. If you look at some raw milk with a microscope, you find that it is made up of little drops of butter fat floating around in a watery liquid. In order to make milk easier to digest, these fat droplets(微粒) may be broken up by forcing the milk through very small openings. The result is called homogenized milk. When the ultrasonic method is used, the sound waves not only break up the droplets but also kill the germs in the milk by pounding them to pieces.

1.Why does a paint manufacturer use ultrasound to do a better job of blending colors?

A. Because it is cheap to use ultrasound to blend colors.

B. Because the waves move the liquid so quickly that it can make materials mix quickly or dissolve in liquids.

C. Because they can mix chemicals by the use of sound waves.

D. Because the waves can clean the paint.

2.What properties does ultrasound wave have?

A. Homogenizes and sterilizes the milk.        B. Mix materials and break droplets.

C. Kill germs and sterilize milk.              D. Move liquids quickly.

3.What exists in the raw milk?

A. Little drops of butter fat.               B. Small holes.

C. Fat droplets and germs.                D. Chemicals.

4.Where is ultrasound wave not used?

A. In the paint manufacture.                  B. In the shop mixing bread flour.

C. In the film-making company.           D. In the dairy industry.

高三英语阅读理解困难题查看答案及解析

People are talking about the new play _______in two weeks.

高三英语单项填空简单题查看答案及解析

People are talking about the new play　　　 in two weeks.

A. to be put on　　 B. being put on

C. put on　　 　　 D. puts on

高三英语单项填空中等难度题查看答案及解析

Suppose you are working as a manager in a famous company in China, and you will be sent to New York for a further study soon, but you don't think your English is good enough. So you are looking for a place where you can improve your English, especially your spoken English.

Here are some advertisements about English language training from newspapers. You may find the information you need.

1.. What is special about the 2lst Century English Training Centre?

A. Its teaching quality is better.

B. It is the nearest to the city center.

C. Its courses are more advanced.

D. It requires an entrance examination.

2.. Which school will you choose if you are busy in the daytime?

A. Global English Center and Modern Language School.

B. Global English Center and the International House of English.

C. Modern Language School and the 2lst Century English Training Centre.

D. The 2lst Century English Training Centre and the International House of English.

3.. If you prefer to have English course on weekends, which telephone number will you call?

A. 67353019.　　　　 B. 67705272.　　　

C. 67801642.　　　　 D. 67432308.

高三英语阅读理解中等难度题查看答案及解析

All the students in our class are working hard every day, which ___ to be a good result in the coming 2012 NMET.

A expects    B. promises   C. supposes   D. thinks

高三英语单项填空中等难度题查看答案及解析

Goats are being hired to do the work of people near SanDiego. The fires that occurred in Hillborbough four years ago destroyed thirty homes, most of which have been rebuilt. While people were rebuilding the homes, the grasses and bushes were growing back. The area is now so overgrown in bushes that there is again a major danger of fire.

The city council asked for offers to remove the bushes. The lowest bid they received was $50,000-----and that was if the city provided breakfast and lunch for the workers for thr six weeks it would take to clear the overgrown area. The city only wanted to give unlimited coffee and a piece of bread a day for each person. When that offer was rejected, the city asked for help on its website.

A sheepherder（养绵羊的人） in Montanta and a goatherder（养山羊的人） in San Bernardino read about the city’s plight （困境）while surfing the Web on their laptops. They both offered to do the job for $25,000. The council chosed the goatherder because he lived closer. When he was told that the city dump（垃圾场） was overflowing , the gotherder said, “No problem. My goats will eat everything in your dump, except the car engines, of course.” So ,for another $5,000, the city killed two birds with one stone. If all goes well, they will invite the goatherder and his “family” back every three years. The goatherder said that he would probably visit San Diego while his goats were in the dump. “I want to go there by plane, I just hope we don’t crash. My goats will miss me a lot.” He said.

1.Why did the city council want to remove the bush?

A. Because the fires in hillborbough destroyed 30 homes.

B. Because people wanted to build their homes there.

C. Because the overgrown bushes could cause fires again.

D.Because two sheeherder offered to do the job.

2.The goatherder was chosen to do the job because________

A. He offered to do it for the lower price

B. It was easier to transport his goat

C. Goats can do the job better than the job

D. The city wanted to raise more goats

3.According to the passage,________

A. the sheepherder offered to do the job for $50.000

B. the lowest bid to remove the bushes was $50,000

C. the sheepherder and the goatherder were both addicted to surfing the Internet.

D. hiring goats to do the job saved the government lots of money.

4. we can infer from the passage that ________

A. the city will remove the bushes in this area regularly

B. the goatherder asked for $50,000 to kill the birds with stones.

C. the goatherder was invited to San Diego to do some sightseeing.

D. the city council was not kind to the people who worked for it.

高三英语阅读理解中等难度题查看答案及解析

The companies are working together to create _____ they hope will be the best means of transport in the 21st century.

A．which            B．that              C．what             D．who

高三英语单项填空中等难度题查看答案及解析

Here are our suggestions for keeping busy this week. Dive in!

Take to the waves in Southampton

Always fancied trying your hand at sailing? Now’s your chance. The Southampton Boat Show has plenty of opportunities for visitors to get out on the water to experience boat sailing, power boating or taking a ride on a RIB ― all for free.

Discover an island on the Thames

To celebrate Totally Thames, a month-long festival is held at various locations across London. We’ve discovered 21 of the river’s most fascinating islands ― all of them with interesting stories to tell. Make the most of it with our map here.

Catch great films in Bristol

Over six days, Encounters Film Festival screens up to 400 films from over 60 different countries. The Bristol festival provides a platform for international filmmakers, and offers a gateway to the likes of the BAFTAs, Oscars and European Film Awards. See here for full details.

Get scientific in London

Experience the latest, best and most challenging science covering all areas of our lives and universe at New Scientist Live at ExCel London. New Scientist Live is a four-day festival full of ideas and discoveries from the team behind the world’s most popular science weekly magazine, featuring four zones ― Brain & Body, Technology, Earth and Universe ― as well as talks from experts and over 200 exhibitors.

1.Which is the most suitable for sailing lovers?

A. Take to the waves in Southampton.

B. Discover an island on the Thames.

C. Catch great films in Bristol.

D. Get scientific in London.

2.What is New Scientist Live?

A. A science weekly magazine.

B. A festival to celebrate great scientists.

C. An exhibition to show scientific discoveries.

D. A festival where ideas and discoveries are shared.

3.Where can you find the text?

A. On a noticeboard.　　 B. On a website.

C. In a newspaper.　　 D. In a book review.

高三英语阅读理解简单题查看答案及解析

Here are our suggestions for keeping busy this week. Dive in!

Take to the waves in Southampton

Always fancied trying your hand at sailing? Now’s your chance. The Southampton Boat Show has plenty of opportunities for visitors to get out on the water to experience boat sailing, powerboating or taking a ride on a RIB--all for free.

Discover an island on the Thames

To celebrate Totally Thames, a month-long festival is held at various locations across London. We’ve discovered 21 of the river’s most fascinating islands--all of them with interesting stories to tell. Make the most of it with our map here.

Catch great films in Bristol

Over six days, Encounters Film Festival screens up to 400 films from over 60 different countries. The Bristol festival provides a platform for international filmmakers, and offers a gateway to the likes of the BAFTAs, Oscars and European Film Awards. See here for full details.

Get scientific in London

Experience the latest, best and most challenging science covering all areas of our lives and universe at New Science Live at ExCel London. New Scientist Live is a four-day festival full of ideas and discoveries from the team behind the world’s most popular science weekly magazine, featuring four zones--Brain&Body, Technology, Earth and Universe--as well as talks from experts and over 200 exhibitors.

1.Which is the most suitable for moviegoers?

A. Take to the waves in Southampton. B. Discover an island on the Thames.

C. Catch great films in Bristol. D. Get scientific in London.

2.What is true about New Scientist Live?

A. A science weekly magazine.

B. A festival where ideas and discoveries are shared.

C. A festival to celebrate great scientist.

D. An exhibition to show scientific discoveries.

3.Where can you find the text?

A. On a noticeboard. B. In a newspaper.

C. On a website. D. In a book review.

高三英语阅读理解简单题查看答案及解析

The companies are working together to create________they hope will be the best means of transport in the 21^st century.

A. which           B. that            C. what          D. who

高三英语单项填空中等难度题查看答案及解析