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A black hole is created when a large star burns out. Like our sun, stars are unbelievably hot furnaces (熔爐) that burn their own matter as fuel. When most of the fuel is used up, the star begins to die.
The death of a star is not a quiet event. First there is a huge explosion. As its outer layer is blasted off into space, the dying star shines as brightly as a billion suns.
After the explosion gravity pulls in what’s left of the star. As the outside of the star sinks toward the center, the star gets smaller and smaller. The material the star is made of becomes tightly packed together. A star is so dense that a teaspoon of matter from it weighs billion of pounds.
The more the star shrinks, the stronger the gravity inside it becomes. Soon the star is very tiny, and the gravity pulling it in is unbelievably strong. In fact, the gravity is so strong that it even pulls light into the star! Since all the light is pulled in, none can go out. The star becomes black when there is no light. Then a black hole is born!
That’s what we know about black holes. What we don’t know is this: What happens inside a black hole after the star has been squeezed into a tiny ball? Does it keep getting smaller and smaller forever? Such a possibility is hard to imagine.
But if the black hole doesn’t keep shrinking, what happens to it? Some scientists think black holes are like doorways to another world. They say that as the star disappears from our universe, it goes into another universe. In other words a black hole in our universe could turn into a “white hole” in a different universe. As the black hole swallows light, the white hole shines brightly—somewhere else. But where? A different place, perhaps, or a different time — many years in the past or future.
Could you travel through a black hole? Right now, no. Nothing we know of could go into a black hole without being crushed. So far the time being, black hole must remain a mystery.
Black holes are a mystery—but that hasn’t stopped scientists from dreaming about them. One scientist suggested that in the future we might make use of the power of black holes. They would supply all of Earth’s energy needs, with plenty to spare. Another scientist wondered if a black hole could some day be used to swallow earthly waste—a sort of huge waste disposal(處理) in the sky!
小題1:When the star begins to die ______.
A．there is no fuel left in itB．its outer layer goes into space first
C．a huge explosion will happenD．it doesn’t give off light any longer
小題2:Which of the following doesn’t help produce a black hole?
A．The gravity inside the star is very strong.B．The light can’t go out of the star.
C．The star becomes smaller and smallerD．The dying star shines very brightly.
小題3:The black hole ______.
A．continues becoming smaller and smaller all the time
B．goes into another universe and becomes a white hole
C．can pull in everything we know of in the world
D．will appear at another place at a different time
小題4:What’s the best title for this passage?
A．A New Scientific Discovery: Black Holes
B．How Do Black Holes Come Into Being?
C．What Are Black Holes?
D．Travel Through A Black Hole

小題1:C
小題2:D
小題3:C
小題4:C

小題1:細節(jié)理解題。根據第二段第二句可知。
小題2:細節(jié)理解題。D項是黑洞形成前的現(xiàn)象。
小題3:根據倒數第二段“Nothing we know of could go into a black hole without being crushed.”可知。其余三項都是科學家們的猜測。
小題4:主旨大意題。題目的選擇應具有高度的概括性、強烈的針對性及一定的醒目性。首先可排除A項，因為黑洞早已不再是新鮮的話題。B、D兩項只是短文的兩個方面。
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閱讀短文，完成問題。
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科目：高中英語 來源：不詳 題型：閱讀理解


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A．parents should leave their children alone
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科目：高中英語 來源：不詳 題型：閱讀理解

Believe it or not, optical illusion(錯覺) 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. But stripes, called chevrons(人字形), painted on the roads make drivers think that they are driving faster than they really are, and thus drivers slow down.
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Chevrons, scientists say, not only give drivers the impression that they are driving faster than they really are but also make a lane appear to be narrower. The result is a longer lasting reduction in highway speed and the number of traffic accidents.
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A．a new way of highway speed control
B．a new pattern for painting highways
C．a new way of training drivers
D．a new type of optical illusion
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A．they should avoid speed-related hazards
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D．they are coming near to the speed limit
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C．will look more attractiveD．will have a longer effect on drivers
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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
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A．They are suitable only on broad roads.
B．They are falling out of use in the United States.
C．They are ignored in a long period of time.
D．They cannot be used successfully to traffic circles.

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科目：高中英語 來源：不詳 題型：閱讀理解

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The United States has more than 17000,000 students in higher education. Each year, 1700 of them die from alcohol-related road crashes and other injuries. 600,000 more are injured while under the influence of alcohol. And almost 700,000 are attacked by another drunken.
One behavior that college officials are trying to prevent is too much drinking. Some researchers have found that students who think binge drinking is normal often think extremely how much other students really drink. A person can die of alcohol poisoning. At Oklahoma University, a nineteen-year-old student died from drinking heavily at a party in 2005
Now alcohol is banned from all sorority houses and university housing. Student organizations can serve alcohol at events but only on Friday and Saturday nights. Other new requirements include an alcohol education program that first-year students take online.
The rules govern behavior on campus (校園) and off. With a first violation(違犯), students pay seventy-five dollars and their parents are told. They must also take an alcohol education class. For a second "strike," they have to pay one hundred fifty dollars. A third strike means that they have to be suspended school for at least one semester.
Since 2005, 363 students have had a first strike. 30 have had a second strike -- and only one hasn’t allowed to go to school for one semester. The president at Oklahoma tells us the aim is not just to punish but to change behavior and the culture at the university.
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A．the legal age at the lowest for drinking alcohol is 21
B．many colleges consider drinking alcohol to be a crime
C．drinking alcohol is a necessary and popular campus culture
D．American colleges and universities have their own alcohol rules
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A．17000,000B．1,301,700 C．601,700D．1300,000
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A．have to stop going to school for a timeB．be removed to another school
C．be locked at home for a period D．be forced to leave school forever
小題4:Which of the following statements is supported by the passage ?
A．College students are not allowed to drink alcohol at any time..
B．If students take an alcohol program online, they can drink alcohol .
C．Students having a first strike only receive punishment of fine
D．Students with a second strike pay twice as much as students with a first strike
小題5:We can infer ________from the last two paragraphs.
A．alcohol rules have no effect on college students
B．drinking alcohol remains a serious problem
C．alcohol rules aim to change behavior and the culture at the university.
D．the number of students drinking alcohol is dropping in one way.

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