The plane may prepare some movies and music for the passengers during the flight.

The plane ______ a few minutes after it took off and most of the passengers died.

A．collided

B．crushed

C．crashed

D．smashed

One fact was clearly demonstrated by the early sleep researchers: one part of the night is not just like another. As scientists began to compare the records of volunteers during the 1950s, they observed that human sleep follows a rhythmic schedule. They noted that not only was this schedule much the same in healthy persons of the same age with similar habits but, from night to night, each individual had an EEG record almost as consistent as a signature.

Sleep and wakefulness, once considered to be the light and dark of consciousness, no longer seem to differ so sharply. To sleep does not mean to drown in an ocean of darkness. Actually, sleep is not a unitary state; it involves many shades or degree of detachment from the surrounding world. While sleep may feel like a blanket of darkness punctuated by dreams—a time when the mind is asleep—nothing could be less true. All night long a person drifts down and up through different levels of consciousness, as if on waves. With laboratory methods, researchers have been able to chart the typical stages of the journey into sleep.

The journey starts while the subject is still awake but beginning to relax. His brain waves, which have been low, rapid, and irregular, begin to show a new pattern. This new pattern, which is known as alpha rhythm, is an even electrical pulsation of about nine to 12 cycles per second. Most people do not know what the alpha state feels like, but during the last few years researchers have been able to teach subjects how to recognize and control their alpha rhythm.

When their EEG shows an alpha rhythm, the subjects are notified, either by a sound or by the appearance of a color on a screen. Because the alpha state tends to be pleasant and relaxed, the ability to sustain it can help tense people ease their passage into sleep. A moment of tension, a loud noise, an attempt to solve a problem, however, and the alpha rhythm may vanish.

As the subject passes through the gates of the unconsciousness, his alpha waves grow smaller, and his eyes roll very slowly. For a moment, he may wake up during this early part of the descent, alerted by a sudden spasm that causes his body to jerk. Like the brain waves, this spasm is a sign of neural changes within. Known as the myoclonic jerk, it is caused by a brief burst of activity in the brain. Although it is related to epileptic seizures, the myoclonic jerk is normal in all human sleep. It is gone in a fraction of a second, after which descent continues. The subject has not felt the peculiar transformation, but now he is said to be truly asleep.

This passage states that a person is really asleep only

A．after dreaming has passed.

B．when his EEG reveals no alpha rhythm.

C．when his EEG begins to show an alpha rhythm.

D．after the completion of his alpha rhythm decline.

One fact was clearly demonstrated by the early sleep researchers: one part of the night is not just like another. As scientists began to compare the records of volunteers during the 1950's, they observed that human sleep follows a rhythmic schedule. They noted that not only was this schedule much the same in healthy persons of the same age with similar habits but, from night to night each individual had an EEG (电脑图) record almost as consistent as a signature.

Sleep and wadefulness, once considered to be the light and dard of consciousness, no longer seem to differ so sharply. To sleep does not mean to drown in an ocean of darkness. Actually, sleep is not a unitary (单一的) state; it involves many shades or detrees of detachment from the surrounding world. While sleep may feel like a blander of darkness punctuated by dreams-a time when the mind is asleep nothing could be less true. All night long a person drifts down and up through different levels of consciousness, as if on waves. With laboratory methods, researchers have been able to chart the typical stages of the journey into sleep.

The journey starts while the subject is still awake but beginning to relax. His brain waves, which have been low, rapid, and irregular, begin to show a new patten. This new pattern, which is known as alpha rhythm, is an even electrical pulsation (震动) of about nine to 12 cycles per second. Most people do not know what the alpha state feels like, but during the last few years researchers have been able to teach subjects how to recognize and control their alpha rhythm.

When their EEG shows an alpha rhythm, the subjects are notified, either by a sound or by the appearance of a color on a screen. Because the alpha state tends to be pleasant and relaxed, the ability to sustain it can help tense people ease their passage into sleep. A moment of tension, a loud noise, an attempt to solve a problem, however, and the alpha rhythm may vanish.

As the subject passes throuhg the gates of the unconscious, his alpha waves grow smaller, and his eyes roll very slowly. For a moment, he may wake up during this early part of the descent, alerted by a sudden spasm that causes his body to jerk. Like the brain waves, this spasm (痉挛) is a sign of neural changes within. Known as the myoclonic jerk (肌痉挛), it is caused by a brief burst of activity in the brain. Although it is related to epileptic (癫痫) seizures, the myoclonic jerk is normal in all human sleep. It is gone in a fraction of a second, after which descent continues. The subject has not felt the peculiar transformation, but now he is said to be truly aleep.

This passage states than a person is really asleep only ______.

A．after dreaming has stopped

B．when his EEG reveals no alpha rhythm

C．when his EEG begins to show an alpha rhythm

D．after the completion of his alpha rhythm decline

The United States was the country where__________. 查看材料

A.in the development of air transportation

B.the earliest passenger flights were successfully operated

C.to make travel easy and pleasant for the passengers

D.to provide different services

E.the shortage of qualified pilots

F.traveling by air was very cheap

听力原文： A 23-day search operation that begins Thursday will include 84 Americans and their Vietnamese counterparts split in the eight teams. The spokesman for the operation said four of the teams are currently in the midst of a dry season. The spokesman said Vietnam turned over 67 sets of remains which the Vietnamese believed to be of Americans last year, the most since it began returning such remains in the early 1980s. Vietnam first allowed American search teams into the country in 1988 and the first consisted of just three men.

Vietnam has turned over hundreds of sets of remains since the end of the war in 1975. So far 280 such sets have been positively identified as the remains of missing Americans. The remains are examined by forensic specialists at the U.S. military laboratory in Hawaii.

The fates of more than 2,200 American servicemen who are missing in southeast Asia remain unsolved. 1,648 of those are listed as missing in Vietnam or its waters. In an interview with the Associated Press, Major General Thomas Needham, the search operation commander, said he was pleased with the process being made to account for the missing men. He said he and his teams were allowed to go wherever they wished in Vietnam. General Needham said he constantly pushed the Vietnamese to find and hand over more documents about the missing men.

General Needham said that he didn't believe the Vietnamese government was holding back remains. However, he said some individuals who had come across remains were holding them back in the hope of being paid for them. The U.S. does not pay for remains.

In the related development, the U.S.military announced Wednesday that Admiral Charles Lawson, the commander-in-chief of the Pacific, will visit Vietnam beginning January 16th. Admiral Lawson will visit the American Missing-in-Action Office in Hanoi, discuss the issue with the Vietnamese officials and travel south to observe the excavations. Admiral Lawson will become the highest ranking U. S. military officer to visit Vietnam since the end of the War. Admiral Lawson's visit and extensive search come at a time when officials in Washington say the question of the U. S. trade embargo against Vietnam is under active review.

Ann Butler for VOA news, Bangkok.

How many missing American servicemen have been positively confirmed dead in Vietnam so far?

A．67.

B．280.

C．84.

D．1648.

Nowadays airports provide all kinds of services 查看材料

A.in the development of air transportation

B.the earliest passenger flights were successfully operated

C.to make travel easy and pleasant for the passengers

D.to provide different services

E.the shortage of qualified pilots

F.traveling by air was very cheap

听力原文： Florence Hayes is a journalist for the Green Ville Journal, the daily newspaper in town. Specifically she covers crime in the Green Ville area. This responsibility takes her to many different places every week—the police station, the court and the hospital. Most of the crimes that she writes about fall into two groups: violent crimes and crimes against property. There isn't much violent crime in a small town like Green Ville, or at least not as much as in the large urban areas. But assaults often occur on Friday and Saturday nights, near the bars downtown. There're also one or two rapes on campus every semester. Florence is very interested in this type of crime and tries to write a long article about each one. She expects that this will make women more careful when they walk around Green Ville alone at night.

Fortunately, there were usually no murders in Green Ville. Crimes against property make up most of Miss Hayes's reporting. They range from minor cases of deliberate damaging of things to much more serious offenses, such as car accidents involving drunk drivers or bank robberies. But Florence has to report all of these violations from the thief who took typewriters from every unlocked room in the dormitory to the thief who stole one million dollars worth of art work from the university museum. Miss Hayes enjoys working for a newspaper but she sometimes gets unhappy about all the crimes she has to report. She would prefer to start writing about something more interesting and less unpleasant such as local news or politics, maybe next year.

Questions:

32. What is Florence Hayes’main responsibility as a journalist?

33. What does the speaker say about security in Green Ville?

34. What do we learn about crimes against property in the Green Ville area?

35. What would Florence Hayes prefer to do?

(33)

A．Covering major events of the day in the city.

B．Reporting criminal offenses in Greenville.

C．Hunting news for the daily headlines.

D．Writing articles on family violence.

听力原文： Florence Hayes is a journalist for the Green Ville Journal, the daily newspaper in town. Specifically she covers crime in the Green Ville area. This responsibility takes her to many different places every week—the police station, the court and the hospital. Most of the crimes that she writes about fall into two groups: violent crimes and crimes against property. There isn't much violent crime in a small town like Green Ville, or at least not as much as in the large urban areas. But assaults often occur on Friday and Saturday nights, near the bars downtown. There're also one or two rapes on campus every semester. Florence is very interested in this type of crime and tries to write a long article about each one. She expects that this will make women more careful when they walk around Green Ville alone at night.

Fortunately, there were usually no murders in Green Ville. Crimes against property make up most of Miss Hayes's reporting. They range from minor cases of deliberate damaging of things to much more serious offenses, such as car accidents involving drunk drivers or bank robberies. But Florence has to report all of these violations from the thief who took typewriters from every unlocked room in the dormitory to the thief who stole one million dollars worth of art work from the university museum. Miss Hayes enjoys working for a newspaper but she sometimes gets unhappy about all the crimes she has to report. She would prefer to start writing about something more interesting and less unpleasant such as local news or politics, maybe next year.

Questions:

32. What is Florence Hayes’main responsibility as a journalist?

33. What does the speaker say about security in Green Ville?

34. What do we learn about crimes against property in the Green Ville area?

35. What would Florence Hayes prefer to do?

(33)

A．Covering major events of the day in the city.

B．Reporting criminal offenses in Greenville.

C．Hunting news for the daily headlines.

D．Writing articles on family violence.