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The Intel Science Talent Search is the top science competition for high school students in the US. The 40 finalists were honored in Washington last week. They met with scientists and politicians. President Obama welcomed them to the White House.
These 40 students were selected from almost 2,000 contestants nationwide. They had to present original research to be judged by professional scientists. The students showed their research projects on large posters. The winners were announced on March 15th, 2011.
Wendy Hawkins is executive director of the Intel Foundation, who says the 40 finalists represented excellence across many areas of science.
Selena Li is from Fair Oaks, California. She wanted to find a more effective treatment for liver cancer. She began her research four years ago. A scientist at the University of California, Davis, taught her how to design and do experimental work in the laboratory. Ms. Li placed 5th in the Intel Science Talent Search and was awarded 30,000 dollars.
Scott Boisvert lives near Phoenix, Arizona. He began using a laboratory at the University of Arizona at the age of 14. Over four years, he completed a project studying a fungus(真菌) linked to the decrease in amphibians(两栖动物)around the world. He was trying to find out if different chemicals and substances in the water could kill the fungus. He collected and tested water samples across Arizona. He says, “My results were able to identify a list of chemicals that were significant in the growth and in the movement of the fungus.” He placed10th in the Intel competition and was awarded 20,000 dollars.
Evan O’Dorney of Danville, California, won the top award of 100,000 dollars in this year’s Intel Science Talent Search. For his mathematical project, he compared two ways to estimate the square root of an integer (整数) , a number with no fractional parts.
Wendy Hawkins at the Intel Foundation says these young people represent the next generation of scientists who will help shape America’s future.
【小题1】According to the passage, if you want to win the Intel Science Talent Search, you must________.
| A.have high academic achievement |
| B.be excellent in all areas of science |
| C.offer original research |
| D.do many experiments in a university lab |
| A.Wendy Hawkins. | B.Selena Li. |
| C.Scott Boisvert. | D.Evan O’Dorney |
| A.Scott Boisvert found a new fungus linked to the decease in amphibians. |
| B.The 1st, 5th and 10th students in the competition come from California. |
| C.Scott Boisvert is the youngest winner among the 40 students. |
| D.The Intel Science Talent Search is an intense competition. |
| A.critical | B.negative | C.positive | D.mixed |
When most people think of giant pandas, the pictures of the cute, black-and-white bears from China that eat bamboo will immediately jump into their mind. Scientists from Mississippi State University, however, are interested in what they leave behind: their poop(排泄物). At a recent meeting in Denver, Professor Brown at the university presented her research showing how panda poop could inspire a new way to obtain energy from plants, which are a renewable energy source. Usually, plants can be called biomass(有机燃料) when they are used as an energy source.
Burning biomass is one way to capture its energy, but Brown hopes panda poop can teach scientists something about breaking down biomass. Pandas—or at least the bacteria in their stomachs—are very good at getting energy out of bamboo. Unlike cows, which use 4 stomachs to digest large amounts of grass, a panda has only one stomach. Bamboo comes in, and poop goes out.
Every day for 14 months, Brown and her team on this project, counted the bacteria in the poop of the two pandas, YaYa and LeLe living at the Memphis Zoo. Her studies turned up 12 species of bacteria that break down biomass, including one that had never been found in pandas. Brown says that because the poop contains bacteria that break down biomass, it could also be used to break down other types of biomass.
Now the scientists hope to identify the chemicals that help with the process of breaking down biomass and then figure out how the bacteria work. If those chemicals can be made in the lab, they could be used to turn biomass—like grass or other plants—into fuel.
Brown says she doesn’t mind handling panda poop. “It’s probably the most pleasant material to work with,” she says, “My colleagues and I have been working with other poop for a long time, and we can assure you it has a fairly pleasant smell associated with it.”
1.The importance of studying panda poop is _______.
A. to create a renewable energy from plants
B. to explore a new way to get energy from plants
C. to learn a lesson of energy from panda poop
D. to figure out how the bacteria work for us mankind
2.The process of the panda poop project can be described as ______.
|
a. Identify the chemicals helpful to break down biomass. b. Find the bacteria in panda poop which break down bamboo. c. Reproduce the chemicals in the lab to turn biomass into energy. d. Analyze how the bacteria in panda poop work in panda’s stomach. |
A. a, b, d, c B. a, d, c, b C. b, a, d, c D. b, d, a, c
3.What does the author mainly want to express in the 2nd paragraph?
A. Pandas don’t digest bamboo the same way as cows.
B. Pandas are capable of getting energy using stomachs.
C. Pandas can get energy from bamboo more efficiently.
D. Scientists have learnt something new from panda poop.
4.What does Professor Brown think of working with panda poop?
A. Sick B. Challenging C. Inspiring D. Enjoyable
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(2011·安徽卷)B
Think about the different ways that people use the wind. You can use it to fly a kite or to sail a boat. Wind is one of our cleanest and richest power sources(来源), as well as one of the oldest. Evidence shows that windmills(风车)began to be used in ancient Iran back in the seventh century BC. They were first introduced to Europe during the 1100s, when armies returned from the Middle East with knowledge of using wind power.
For many centuries, people used windmills to grind(磨碎)wheat into flour or pump water from deep underground. When electricity was discovered in the late 1800s, people living in remote areas began to use them to produce electricity. This allowed them to have electric lights and radio. However, by the 1940s, when electricity was available to people in almost all areas of the United States, windmills were rarely used.
During the 1970s, people started becoming concerned about the pollution that is created when coal and gas are burned to produce electricity. People also realized that the supply of coal and gas would not last forever. Then, wind was rediscovered, though it means higher costs. Today, there is a global movement to supply more and more of our electricity through the use of wind.
60. From the text we know that windmills .
A. were invented by European armies
B. have a history of more than 2800 years
C. used to supply power to radio in remote areas
D. have rarely been used since electricity was discovered
61. What was a new use for wind power in the late l9th century?
A. Sailing a boat.
B. Producing electricity.
C. Grinding wheat into flour.
D. Pumping water from underground.
62. One of the reasons wind was rediscovered in the 1970s is that .
A. wind power is cleaner
B. it is one of the oldest power sources
C. it was cheaper to create energy from wind
D. the supply of coal and gas failed to meet needs
63. What would the author probably discuss in the paragraph that follows?
A. The advantage of wind power.
B. The design of wind power plants.
C. The worldwide movement to save energy.
D. The global trend towards producing power from wind.
【解析】选D。推理判断题。根据末段句子Today, there is a global movement to supply more and more of our electricity through the use of wind可知,接下来作者应该谈论利用风能发电的情况,因此选择D项。
查看习题详情和答案>>Bend over, take a deep breath and drink some water! This is just one of hundreds of tips you might get if you have the hiccups (打嗝).Hiccups are so mysterious.We really don't know why they start and why they stop.
Everyone has a favorite cure for a case of the hiccups.Some people think that a good scare is necessary to get well.Others eat a teaspoon of sugar.Still others drink a glass of water with a knife in it.
An American man named Jack O'Leary said he had hiccupped 160 million times over a period of eight years.He tried 60,000 cures, but none of them worked.At last he prayed to Saint Jude, the saint of Hopeless cases, and his hiccupping stopped immediately.
It took a British plumber eight months to cure his hiccups.People from all over the world wrote him letters with suggestions for getting well.He tried them all, but the hiccups continued.Finally, he drank a "secret" mixture someone had sent him.By that evening his hiccups were gone.
Why did these cures work for these two men? No one really knows.But people who have studied many cases of hiccups have an idea—hiccups usually go away if you believe in the cure.
【小题1】How did Jack O'Leary stop his hiccups?
| A.He took a deep breath. | B.He prayed to Saint Jude. |
| C.He ate a teaspoon of sugar. | D.He drank a "secret" mixture. |
| A.4 hours | B.2 days | C.8 months | D.8 years |
| A.Cold water | B.A spoonful of salt |
| C.Special pills | D.What you believe in |
| A.Saint Jude is an expert in curing the hiccups |
| B.the reason why the hiccups start and why the hiccups stop |
| C.some people think that a good scare is a cure for a case of hiccups |
| D.the British plumber drank a "secret" mixture given by an experienced doctor and then became well |
| A.Different ways to stop hiccups. | B.What makes hiccups happen. |
| C.How to get hiccups. | D.Jack O'Leary's hiccups. |
Bend over, take a deep breath and drink some water! This is just one of the hundreds of tips you might get if you have the hiccups(打嗝). Hiccups are so mysterious. We really don’t know why they start and why they stop.
Everyone has a favorite cure for a case of the hiccups. Some people think that a good scare is necessary to get well. Others eat a teaspoon of sugar. Still others drink a glass of water with a knife in it.
An American man named Jack O’Leary claimed to have hiccupped 160 million times over a period of eight years. He tried 60,000 cures, but none of them worked. Finally he prayed to Saint Jude, the saint of Hopeless cases, and his hiccupping stopped immediately.
It took a British plumber eight months to cure his hiccups. People from all over the world wrote him letters with suggestions for getting well. He tried them all, but the hiccups continued. Finally, he drank a “secret’’mixture someone had sent him. By that evening his hiccups were gone. Why did these cures work for these two men? No one really knows. But people who have studied many cases of hiccups have an idea. Hiccups usually go away if you believe in the cure.
1.
________might be the best cure for hiccups.
|
A.Special pills |
B.A spoonful of salt |
C.Cold water |
D.What you believe in |
2.
The plumber spent________in stopping his hiccups.
|
A.4 hours |
B.2 days |
C.8 months |
D.8 years |
3.
According to the passage, which of the following is TRUE?
|
A.We know why the hiccups start, but we don’t know how to stop them. |
|
B.Saint Jude is an expert in curing the hiccups. |
|
C.The British plumber drank a secret mixture given by an experienced doctor and then became well. |
|
D.Some people think that a good scare is a cure for a case of hiccups. |
4.
What is the main idea of this passage?
|
A.Different ways to stop hiccups |
B.What makes hiccups happen |
|
C.How to get hiccups |
D.Jack O’Leary’s hiccups |
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