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题目
What Is Death？
People in the past did not question the difference between life and death. They could see that a person died when his heart stopped beating. People have learned, however, that the body does not die immediately when the heart stops beating. They discovered that we remain alive as long as our brain remains active. Today the difference between life and death is not as easy to see as in the past. Modern medical devices can keep the heart beating and the lungs breathing long after the brain stops. But is this life？
This question has caused much debate among citizens in the United States. Many of them want a law that says a person is dead when the brain dies. A person should be considered dead when brain waves stop even if machines can keep the body alive. Such a law would permit doctors to speed removal (切除) of undiseased (没病的) organs for transplant (移植) operations.
The brain is made of thousands of millions of nerve cells. These cells send and receive millions of chemical and electrical messages every day. In this way the brain controls the other body activities. Nerve-cell experts say it is usually easy to tell when the brain has died. They put small electrodes (电极) on a person's skull (头骨) to measure the electrical signals that pass in and out of the brain. These brain waves are recorded on a television screen or on paper. The waves move up and down every time the brain receives messages from the nerve cells. The brain is dead when the waves stop moving.
Although there are people who oppose the idea of a law on brain block for various reasons, the idea of brain wave activity as a test of death is slowly being accepted.
第 31 题 People in the past held that the difference between life and death
A．did not exist.
B．was easy to tell.
C．lay in the brain.
D．was open to debate.
更多“What Is Death？ People in the past did not question the difference between life and de”相关的问题
第1题
A.played with her parents.
B.seldom talked with other peopl
C.spend a lot of time discussing the futur
D.kept writing her diary.
第2题
A.It is like the White Hous
B.It is crowded with thousands of peopl
C.It is so simple actually just a man and his computer.
D.It is located in top-secret zon
第3题
A．It symbolizes the ability to seize new market shares worldwide
B．It pushes the growth of GDP．
C．It makes China more open to the worl
D．It improves the living standard of the Chinese peopl
E．
第4题
A.It increased the amount of data generate
B.It led to numerous new ways of getting value out of connecting peopl
C.It unleashed many new enterprise applications.
D.It generated a new passion for “data mining”.
第5题
A.A.American stores could provide new kinds of products to peopl
B.B.High tech describes a technology that is not traditional.
C.C."State of the art" is not as popular as "high tech".
D.D.A modem plough pulled by oxen is "state of the art".
第6题
A．It allowedpeople to speak with the computer．
B．It enabled users to interact with computers through icons．
C．Itused simple line commands instead of complex ones．
D．Itput computers in the hands of ordinary peopl
E．
第7题
A．They are civilized peopl
E．
B．They are respected by the citizens in the United States．
C．They enjoy the same right as other citizens in the United States．
D．They are discriminated and not allowed to enter in most public places．
第8题
E．Friendships develop slowly, since they are built to last.
B．I n C hina there are few limits on what you can ask or expect of a frien
D．You can feel free to tell your friend what he or she can or should do to help you.
C．In China,friendships are based on common interests. When the shared activity ends, the friendship may fade
D．Americans expect their friends to be independent , so they do not feel comfortable in a relationship in which one person is giving more and the other person is dependent on what is being given.
第9题
What requires a Report of Marine Accident，Injury or Death？
A.Collision with a bridge
B.Injury beyond first aid
C.loss of life
D.All of the above
第10题
.
A. that B. since C. because D. because of
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