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 forth hundreds 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. (from www.nmet168.com)
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.
Today I was at the mall waiting for friends, when a lady wearing a knit hat and a sweater came up to me and, shivering, said, “I’m homeless. Would you mind buying me some food?”
In that split second, everything I’d learned since kindergarten flashed through my mind. Don’t talk to strangers … Be a good citizen … People will take advantage of you … Treat others as you wish to be treated … The greatest thing you’ll ever learn is just to love and be loved in return … I guess love won the debate. “Sure,” I said. “What would you like?”
She thought and then said, “I’d like to get Chinese food.” We headed upstairs. On the way she told me about when she was a teenager. She remembers taking pictures for the yearbook with her best friend. She was in the band and played basketball. She got good grades and was a good student.
She ordered soup, an egg roll, white rice, and pepper chicken. I would normally think that was a lot, but she had probably barely eaten in the last few days. I got my usual – lo mein and General Tso’s chicken.
As we ate, we got to know each other. She asked if I played any instruments. I replied that I played the violin, cello, and guitar. She told me she played the flute, piano, guitar, and violin. In the middle of our meal, I realized something. And she thought of it at exactly the same time.
“So, what’s your name?” she asked.
“I’m Claire,” I said, startled at our exact same thought. “What’s yours?”
“Joyce,” she said with a smile.
We continued talking, and she asked my favorite subjects in school and if I wanted to go to college. “Hopefully,” I replied. “I’m interested in nursing.”
“I went to college for nursing,” she said.
I was taken aback. How could we have so much in common? Was she pretending so I’d feel sympathy for her? But her eyes were genuine as she said this.
Meanwhile I was eating my lo mein, picking around the cabbage and the other vegetables. Joyce said, “If you don’t like it you can take it back.” I told her that I liked it, but was not fond of the vegetables. She broke into a big grin. “You don’t like vegetables, huh? Neither did I. But now I do.” I immediately felt guilty. How could I be picking at my food across from someone who barely gets to eat at all?
I tried my best to finish, but she seemed to sense my guilt and said, “You don’t have to eat it if you don’t want it.” How could she know what I was feeling? I told her the dish was my favorite, but I just eat slowly.
She replied, “I used to like lo mein, but pepper chicken was my dad’s favorite, so I get that now.” Noticing that she used the word “was,” I assumed her dad had passed away. I found it sweet that she gave up her favorite in order to honor her dad.
She asked why I was at the mall.
“I’m waiting for friends. We’re going to see ‘The Curious Case of Benjamin Button,’” I replied, stumbling over the words a bit.
“‘The Curious Case of Benjamin Button,’” she echoed in awe. “What’s that about?” I realized that she didn’t see commercials for movies.
I explained the basic plot and she chuckled. “A man who is born 80 years old and ages backwards! That sounds interesting.”
She got up to get a to-go box. “Would you like one?” she asked, but I refused. I realized that this food would probably last her for a few days, and I was glad she had ordered a lot.
“Would you like these?” I asked, gesturing at the food I had left untouched. “Oh, no, thank you,” she said. “This is enough.” I got up to throw my tray away, feeling guilty about wasting so much.
“I need to meet my friends now,” I explained. “It was so nice to meet you, Joyce.”
“You too, Claire,” she replied with a smile. “Thank you.”
I headed to the theater, and she went back downstairs. It sounds like a perfect coincidence, but I can’t help but think that some force compelled us to meet. I kept puzzling, Why is Joyce homeless? It seems so unfair. She shouldn’t need people to buy her dinner. She was a nurse. She got good grades. She took pictures for her yearbook. She was the person I hope to be in the future. What went wrong? How could such a good life be rewarded with horrible luck?
I feel lucky to have run into Joyce. She changed my outlook. She is still a wonderful person, despite what the world has done to her. I wish her the best, and can only hope that the force that brought us together will help her find what she deserves in life. From the second paragraph we know that the writer _________.
| A．debated with the girl over moral issues |
| B．hates having to make a quick decision |
| C．hesitated before she decided to reach out |
| D．fell in love with the girl at the first sight |
The writer felt guilty for a moment because ________.
| A．she was particular about food and also wasted so much |
| B．she was a strict vegetarian who ate very little |
| C．she didn’t order enough food for the girl |
| D．she urged the girl to take her share of food |
Why did Joyce end up unemployed and homeless?
| A．She was a victim of high education |
| B．She actually had some kind of mental disorder |
| C．She graduated with average grades |
| D．The reason is not yet given. |
Which detail doesn’t show the coincidence in the story?
| A．They both took interest in nursing. |
| B．They were about to ask names of each other at the same time. |
| C．When Claire headed to the theater, Joyce went back downstairs. |
| D．They were both musical lovers. |
The writer was very happy to have met Joyce because______.
| A．she didn’t know what she was going to be until then. |
| B．this chance meeting changed her attitudes towards life in a way. |
| C．she was glad to be able to pay for someone in need. |
| D．hopefully the force that brought them together may bring good luck to Joyce. |
The passage is intended to _______.
| A．arouse readers’ curiosity |
| B．explore social problems |
| C．teach readers a lesson |
| D．share a sweet personal story |
Many people have never heard of Mesothelioma and are unaware of its symptoms. Although considered a rare form of cancer, each year the number of cases grows. With the prevalence(流行)of this disease on the rise, it is critical to understand why and how Mesothelioma develops and what courses of action can be taken in the event of diagnosis. The following is a list of frequently asked questions and answers that will provide you with some information on Mesothelioma, and the legal issues surrounding it.
What is Mesothelioma?
Mesothelioma is the term used to describe a cancerous tumor found in the mesothelial cells of an organ. The organs where this form of cancer is most commonly found are the lungs, heart and abdominal organs. Pleural Mesothelioma is cancer of the lung lining(组织,膜)and is the most common form of Mesothelioma.
What causes Mesothelioma?
Mesothelioma is almost always caused by exposure to asbestos(石棉). Asbestos is often found in building materials used before the mid 1970's. In addition, materials such as pipes, boiler insulation, floor, ceiling and roof tiles may contain asbestos.
How much asbestos exposure will cause Mesothelioma?
Generally, the probability of developing this form of cancer is in accordance with the length of time you are exposed to asbestos. Also, your health is at risk if your exposure to asbestos is intense. It should be noted that Mesothelioma has a latency(潜伏)period of 20 to 50 years. This means that you may develop the disease long after your exposure to asbestos. On average, people tend to develop Mesothelioma somewhere between 35 and 40 years after exposure.
How quickly does Mesothelioma progress?
The onset of Mesothelioma is quite slow. Patients will begin to experience symptoms such as lower back pain and chest pain. These symptoms may also be accompanied by weight loss, fever and difficulty breathing. Unfortunately, once Mesothelioma develops, it quickly becomes aggressive and treatment must be sought immediately.
Can Mesothelioma be treated?
Doctors are able to use several traditional methods of cancer treatment for Mesothelioma, including surgery, chemotherapy and radiation. Like all forms of cancer, detecting the disease at the earliest stage possible greatly increases the patient's chances for survival. If you have worked in an industry such as construction or suspect that you may have been exposed to asbestos, be alert for symptoms and contact your doctor immediately.
What legal courses of action can be taken?
Anyone suffering from Mesothelioma is entitled to compensation from asbestos manufacturers. Additionally, if you are the spouse or child of someone who has died from Mesothelioma, you are entitled to file a claim and seek compensation.The authors intends to _______.
| A．tell the readers how important it is to know more about Mesothelioma. |
| B．provide more information about Mesothelioma |
| C．give advice on how tto avoid developing Mesothelioma |
| D．tell the readers how terrible Mesothelioma is |
We can learn from the text that _______.
| A．Asbestos is to blame for Mesothelioma. |
| B．Even if a person is exposed to asbestos for a while, he will die soon. |
| C．All the employees can ask for compensation from asbestos manufacturers. |
| D．Mesothelioma is a cancer familiar to many people. |
The following are the symptoms of Mesothelioma EXCEPT ______.
| A．frequent headache | B．lower back pain |
| C．chest pain | D．difficult breathing |
Which of the following would be the best title for the text?
| A．Terrible Mesothelioma |
| B．Mesothelioma is around us |
| C．Frequently Asked Questions About Mesothelioma |
| D．Mesothelioma in on the rise |
If you work in an industry exposed to asbestos, you should ________.
| A．give up the job immediately |
| B．ask for a rise from your boss |
| C．file a claim and seek compensation |
| D．go to hospital and have your body examined |
In what section of a newspaper will you probably read the advertisements?
| A．Geography | B．Education | C．History | D．Environment |
What do Science Museum Oklahoma and Leonardo’s Discovery Warehouse have in common?
| A．Aiming at science |
| B．Introducing animals |
| C．Offering imaginary roles |
| D．Enjoying a trip to the universe |
Emma has a tight schedule and has to work from 10am-5pm every day. If she wants to visit a museum, which website will she probably login to get more information?
| A．http://www.jasminemoran.com/ |
| B．http://www.museumgreatplains.org/ |
| C．http://tulsaairandspacemuseum.com/ |
| D．http://www.sciencemuseumok.org/ |
Which of the following can be learned from the advertisements?
| A．Visitors can enjoy family fun in all the museums except the Museum of the Great Pains. |
| B．Visitors can experience something related to culture in the Tulsa Air and Space Museum. |
| C．Visitors can phone (405) 382-0950 if their children want to enjoy role-playing programs. |
| D．Visitors can explore an adventure of outer space in 601 NW Ferris Ave Lawton, OK. |
What may be the purpose of the writer writing the passage?
| A．To show his knowledge of museums |
| B．To provide some information on museums |
| C．To attract attention from the readers |
| D．To entertain readers |
When Chinese student Du Juan brought her American boyfriend home two years ago to use the toilet, her Japanese roommate became so upset that she shouted in English: "I hate you."
Du, then 21 and an undergraduate at Bridgewater State College in Massachusetts, was shocked. So was her boyfriend.
"Later I realized that she didn't literally mean what she said and that she was not aware of the full meaning of the word 'hate' in English," said Du. "It was more a problem with translation," she added.
Cultural differences can cause confusion about what words or even actions mean, an issue that has come to the forefront recently following the arrest of a Chinese doctoral degree student in New Jersey.
Zhai Tiantian, who studied at the Stevens Institute of Technology, has been accused of trying to set fire to a campus building and of making threats to a professor who gave him a low mark. No physical altercation took place but Zhai reportedly said something along the lines of "at worst, I will risk anything on the line." The professor called the campus police.
According to the indictment sheet（起诉书）, Zhai is facing the serious charge of making a terroristic threat.
For a few days, Chinese media mistranslated, or misunderstood, the charges and reported that Zhai was being charged with terrorism.
Some language experts have speculated（推测） that the disagreement between Zhai and the professor can also be chalked up to cultural and linguistic differences. "What Chinese people regard as acceptable speech may be regarded by Americans as threats," said Luo Gang, the Chinese Consulate's Overseas Chinese Affairs consul. "This is an unfortunate incident. Even though Zhai intended no harm, he has done himself a great deal of harm."
Du, now 23, said she supports Zhai's actions in fighting to save his academic career, but added he needs to learn more about communication in a foreign language.
"Chinese students in a foreign country must prepare more in terms of languages and conversation skills to avoid misunderstandings," she said.What does the underlined word “altercation” mean？
| A．fight | B．check | C．education | D．experiment |
By saying “It was more a problem with translation”, what does Du Juan mean?
| A．Translation was not the real problem, as Du Juan and her roommate can both speak English. |
| B．Du Juan can not understand what her roommate meant at all. |
| C．Her roommate didn’t know what “hate” really meant in daily conservation. |
| D．Her roommate spoke such poor English that she felt angry. |
Which of the following statements about Zhai Tiantian is true?
| A．He set fire to a campus building. |
| B．He argued with a professor because he received a low mark. |
| C．He has received a doctor’s degree at the Stevens Institute of Technology. |
| D．He is facing a serious charge because he murdered the professor. |
What is the main idea of the passage?
| A．Du Juan’s unpleasant experience abroad. |
| B．Confusion caused by translation. |
| C．Conservational skills in a foreign country. |
| D．Cultural differences between China and America. |
Believe it or not, optical illusion(错觉) can cut highway crashes.
Japan is a case in point. It has reduced automobile crashes on some roads by nearly 75 percent using a simple optical illusion. Bent strips, called chevrons（人字形标志）, painted on the roads make drivers think that they are driving faster than they really are, and thus drivers slow down.
Now the American Automobile Association Foundations For Traffic Safety in Washington D.C. is planning to repeat Japan’s success. Starting next year, the foundation will paint chevrons and other patterns of stripes on selected roads around the country to test how well the patterns reduce highway crashes.
Excessive（过分） speed plays a major role in as much as one fifty of all fatal traffic accidents, according to the foundation. To help reduce those accidents, the foundation will conduct its tests in areas where speed-related hazards(危险) are the greatest-curves, exit slopes, traffic circles, and bridges.
Some studies suggest that straight, horizontal bars painted across roads can initially cut the average speed of drivers in half. However, traffic often returns to full speed within months as drivers become used to seeing the painted bars.
Chevrons, scientists say, not only give drivers the impression that they are driving faster than they really are but also make a lane（车道） appear to be narrower. The result is a longer lasting reduction of highway speed and the number of traffic accidents.The passage mainly discusses________.
| A．a new way of highway speed control |
| B．a new pattern for painting highway |
| C．a new way of training drivers |
| D．a new type of optical illusion |
On roads painted with chevrons, drivers tend to feel that________.
| A．they should avoid speed-related hazards |
| B．they are driving in the wrong lane |
| C．they should slow down their speed |
| D．they are coming near to the speed limit |
According to the foundation,____can cause serious traffic accident
| A． the straight, horizontal bars |
| B．greatest curves |
| C．exit slops , traffic circles, bridges |
| D． Over-speed driving |
The advantage of chevrons over straight, horizontal bars is that the former______.
| A．can keep drivers awake |
| B．can cut road accidents in half |
| C．will look more attractive |
| D．will have a longer effect on drivers |
The Americans automobile association foundation for traffic safety plans to____.
| A．try out the Japanese method in certain areas |
| B．change the road signs across the country |
| C．replace straight, horizontal bars with chevrons |
| D．repeat the Japanese road patterns |