Electriccarsaredirty.Infact,no-优题课

It is natural that children are curious about the world around them．For example, they want to know how their hearts beat．They want to know why the ocean water tastes salty．
As children grow up, they become curious about different kinds of things．When they are babies, they are interested in the parts of their bodies and in the smiles of their mothers．They become interested in the physical world around them: the plants, the animals, the sky．Later, they become interested in the things that people have made: wheels, bicycles, cars．And when they are adults, their curiosity continues．Sometimes this curiosity leads to a career in science．
Scientists spend their lives trying to find out about the world．Those who work with the earth sciences study the earth, the oceans, and the sky．Other scientists who study living things work with the biological sciences．A third group of scientists study the physical sciences, e．g．physics, chemistry ．
These scientists have already discovered a lot about our world．For example, they tell us why your heart beats fast when you run．They say that when you are quiet, your heart normally beats 65 or 75 times a minute．Your heart is a pump that pumps blood to all parts of the body．The blood carries oxygen and nutrition．When you run, your muscles work very hard and use the nutrition that the blood carries to them．The muscles need oxygen, too．So your brain sends a signal to the heart．The signal means that the muscles need more nutrition and oxygen．Then the heart beats fast and sends blood quickly to the muscles．It may beat 90 to 140 times a minute．
Of course, scientists cannot answer all of our questions．If we ask, “Why does the ocean water taste salty” scientists will say that the salt comes from rocks．When a rock gets very hot or very cold, it cracks．Rain falls into cracks．The rain then carries the salt into the earth and into the rivers．The rivers carry the salt into the ocean．But then we ask , “What happens to the salt in the ocean? The ocean does not get saltier every year．” Scientists are not sure about the answer to this question．
We know a lot about our world, but there are still many answers that we do not have, and we are curious．
63．According to the passage, which of the following statements is true?
　 A．People are curious in the same way．
　 B．People in different countries are interested in different things．
　 C．People of different ages are interested in different things．　
D．Men and women are curious about different things．
64．Scientists who work with the biological sciences study____．
A．the earth , the oceans and the sky B．plants and animals
C．man-made things D．ocean water
65．A rock cracks _____．
A．in wet regions B．in dry regions
C．when salty water falls in D．at very high or very low temperatures
66．People are always curious because _____ ．
A．they know little about the world B．they know nothing about the world
C．they can not explain many things D．they want to be scientists

Just at that time, a telegram arrived from his brother．Mr．Jameson opened it quickly．It said, “Come home at once．Your wife is ill and in a critical condition．West End Hospital．”Mr．Jameson began to think．Since the work at the mine was going well, he decided to go home at once．He just told himself again and again that he couldn’t lose his wife, or his life would be meaningless．
At about 6 the next morning, he and one of his assistants reached Lamesa, where they were going to Chicago at 6:30．There was still half an hour left before the train started, so Mr．Jameson decided to telephone to Chicago to ask about his wife．And after that, if still enough time was left he could see a doctor and have the piece of coal or the piece of metal removed out of his eye．His eye and his whole head ached now．
After he sent his assistant to the railway station to buy tickets for the train, he went to make the phone call．When the operator put through his call, he sat down and waited．His eye felt like a piece of hot iron．And he was worried about his sick wife．The phone rang．Soon Mr．Jameson talked with the hospital in Chicago．A voice said, “Yes, sir! Your wife is here．She is much better．There is no danger now．You don’t have to return．”
Everything was all right．His wife was going to live．He would not lose his wife．Quite excited, Mr．Jameson began to cry like a little child and could not stop．Big tears rolled out of his eyes and down his cheeks．Soon his eye felt better．He touched his eye and felt something in the corner of his eye．That was a small piece of coal．His tears had washed it out of his eye!
59．What happened to Mr．Jameson before setting off?
A．He was hurt and couldn’t walk．
B．His eye was suffering from a certain disease．
C．A small piece of coal stuck him in the eye．
D．A piece of metal got into his eye．
60．The writer doesn’t mention but we can infer that Mr．Jameson probably _____．
A．worked in a factory in Chicago
B．worked as a mining engineer in a company
C．was worried about his work on the way to Chicago
D．sold coal in a faraway village
61．How was the coal removed out of Mr．Jameson’s eye?
A．It was taken out by a doctor．
B．A good rest helped it out．
C．He rubbed his eyes slightly．
D．It was washed out by his tears．
62．How can we describe the feeling of Mr．Jameson?
A．Worried ---relaxed B．Excited ---dull
C．Anger---calm． D．Depressed ---nervous．

第三部分：阅读理解（共20小题，共40分）
第一节（共15题, 每小题2分，满分30分）
阅读下列短文，从每题所给的四个选项（A,B,C和D）中，选出最佳选项。
We often hear the phrase: “You have a greater chance of being struck by lightning．”It is used to describe something that hasn’t got much chance of happening．However, the common saying undermines（掩盖）the very real dangers of lightning．
Last Friday, at least 5 people were killed by lightning in Nepal（尼泊尔）．
Lightning strikes are the second most common cause of deaths during natural disasters in the US．The first is floods．Around 400 people nationwide are struck by lightning each year, and of those, 70 people die．That is, more people are killed by lightning than by tornadoes and hurricanes．
Because lightning kills only one or two people at a time, its danger does not receive as much attention as other disasters．
“If you hear thunder, you are in danger from lightning, ”said Rocky Lopes, a disaster educator at the American Red Cross．
“Thunder means that lightning is close enough to hit you at any time, so you should move indoors immediately and stay there until the storm has ended．The most important thing to remember is to seek shelter,”Lopes said．
Summer is the peak time for lightning storms, so when lightning strikes across the sky, remember these safety tips:
*Stop working, fishing, swimming or playing in open fields．
*Do not stand under a tree．
*Get off bicycle and motorcycles．
*Crouch down（蹲下）if there is no shelter．
*Avoid open spaces, wire fences, metal objects and electrical objects such as hair driers．
56．Of the people who are struck by lightning each year in the U．S．A．, about ____ people are lucky enough to continue to live．
A．400 B．330 C．70 D．5
57．If you hear the thunder, the most important thing you do is to _____．
A．find shelter to hide in B．stand still in the open spaces
C．stand under a tree D．stop working in the fields
58．Which of the following is NOT true?
A．If you hear the thunder, you needn’t move indoors right away．
B．Fewer than 70 people are killed by tornadoes and hurricanes each year in the U．S．A．
C．People don’t pay as much attention to the danger of lightning as that of floods．
D．Floods are the first most common cause of deaths during natural disasters in the U．S．A．

Dye (染料) can bring a little color to life. Most clothing is colored with dyes. Modern, manufactured dyes can be costly. Natural dyes from plant and animal products have been used since ancient times. So this week, we describe a natural way to dye wool.
There are several methods to put dye onto material. The vat method, for example, can be used to dye wool with onionskins. For this example, use one hundred grams of natural wool. The wool must be clean. Leave it overnight in water and liquid soap. Then wash it with clean water that is a little warm. Gently squeeze out the extra water.
A solution called a mordant (媒染) is used in the dying process. A mordant helps fix the dye to the material. Traditionally, mordants were found in nature. Wool ash is one example. But chemical mordants such as alum are popular today. Alum is sold in many stores. It is often mixed with cream of tartar, a fine powder commonly used in cooking.
Mix eight grams of alum with seven grams of cream of tartar in a small amount of hot water. Add the solution to a metal pan of cool water. Next, add the wool and place the mixture over heat. Slowly bring the liquid to eighty-two degrees Celsius. Heat the mixture for forty-five minutes. After it cools, remove the wool and wash it.
To prepare the dye solution, cover thirty grams of onionskins with water. Use only the dry, brown outer skins. Boil the liquid until the onionskins lose their color, about forty-five minutes. Remove the skins after the dye cools.
Now it is time to dye the wool. Place the wool into the dye and heat the mixture. Bring it to a boil, then immediately reduce the heat to eighty-two degrees. Now heat the dye for about forty-five minutes or until the wool is the desired color. Keep in mind that wet wool looks darker than it is.
Once the dye cools, remove the wool and wash it. Now the wool is orange or yellow. Or at least it should be.
57. According to the passage, mordants are ________.
A. dyes used in the dying process
B. materials which will be put dye to
C. wood ashes used in the dying process
D. not dyes but play an important role in the dying process
58. Which of the following statements about “natural dyes” is true?
A. They might be cheaper than chemical dyes.
B. They are more expensive than chemical dyes.
C. They have been used for only recent years.
D. They are all made from animal products.
59. As for the vat method, which of the following statements is NOT necessarily needed?
A. Ash. B. Water. C. Mordant. D. Temperature.
60. Choose the proper order of dying wool:
a. boil the liquid with onionskins.
b. add mordants to a metal pan of cool water.
c. wash the wool with clean water.
d. put the wool into the liquid and heat it
e. heat the mixture and then wash it.
A. c, b, e, a, d B. e, b, c, d, a C. b, e, a, d, c D. a, b, e, c, d

In nineteen ninety-nine, twelve percent of public elementary schools in the United States required students to wear uniforms. Just three years later, estimates were almost double that.
A study of six big-city Ohio public schools showed students who were required to wear uniforms had improved graduation, behavior and attendance rates. Academic performance was unchanged.
Some middle and high schools in Texas have also joined the movement. Yet studies find mixed results from requiring uniforms. And some schools have turned away from such policies.
Supporters believe dressing the same creates a better learning environment and safer schools. The school district in Long Beach, California, was the first in the country to require uniforms in all elementary and middle schools. The example helped build national interest in uniforms as a way to deal with school violence and improve learning.
Findings in Long Beach suggested that the policy resulted in fewer behavior problems and better attendance. But researcher Viktoria Stamison, who has looked at those findings, says they were based only on opinions about the effects of uniforms.
She says other steps taken at the same time to improve schools in Long Beach and statewide could have influenced the findings. The district increased punishments for misbehavior. And California passed a law to reduce class sizes.
In Florida, for example, researcher Sharon Pate found that uniforms seemed to improve behavior and reduce violence. In Texas, Eloise Hughes found fewer discipline problems among students required to wear uniforms, but no effect on attendance.
Sociologist David Brunsma has studied school uniform policies since nineteen ninety-eight. He collected the reports in the book. In his own study, he found that reading and mathematics performance dropped after a school in rural Pennsylvania required uniforms.
Political and community pressures may persuade schools to go to uniforms to improve learning. But David Brunsma and others believe there is not enough evidence of a direct relationship. In fact, he says requiring uniforms may even increase discipline problems.
52. What’s the main idea of this passage?
A. More and more students are required to wear uniforms in the US.
B. Wearing uniforms contributes to good academic performance.
C. Researchers in the US argue for school uniform policies.
D. Evidence for school uniform policies in the US is seen as weak.
53. Which was/were the first in the US to require uniforms in all elementary and middle schools?
A. Six big-city Ohio public schools.
B. The school district in Long Beach, California.
C. Some middle and high schools in Texas.
D. Some elementary and middle schools in Florida.
54. Which of the following researchers are NOT supporters of school uniform policies?
A. Viktoria Stamison and Sharon Pate.
B. Sharon Pate and David Brunsma.
C. Eloise Hughes and Sharon Pate.
D. Viktoria Stamison and David Brunsma.
55. The underlined word “misbehavior” in the sixth paragraph probably means ______.
A. serious crime B. bad performance
C. absence for class D. action against wearing uniforms
56. We can infer from the passage that ______.
A. more work is needed to get better information about uniform’s effect
B. the number of schools requiring uniforms in the US will decline sharply
C. wearing uniforms has little to do with behavior and learning
D. politicians and communities won’t vote for uniform policies

A．environmentally-friendly	B．expensive
C．efficient	D．harmful