Even more interesting is the possibility that life on their planets may be in a more advanced stage of evolution. Present-day man is in a peculiar and probably temporary stage. His individual units retain a strong sense of personality. They are, in fact, still capable under favorable circumstances of leading individual lives. But man's societies are already sufficiently developed to have enormously more power and effectiveness
than the individuals have.
It is not likely that this transitional situation will continue very long on the evolutionary time scale. Fifty thousand year's from now man's societies may have become so close-knit that the individuals retain no sense of separate personality. Then little distinction will remain between the organic parts of the multiple organism and the inorganic parts (machines) that have been constructed by it. A million years further on man and his machines may have merged as closely as the muscles of the human body and nerve cells that set them in motion.
The explorers of space should be prepared for some' such situation. If they arrive on a foreign planet that has reached an advanced stage (and this is by no means impossible), they may find it being inhabited by a single large organism composed of many closely cooperating units.
The units may be "secondary"-machines created millions of years ago by a previous form. of life and given the will and ability to survive and reproduce. They may be built entirely of metals and other durable materials. If this is the case, they may be much more tolerant of their environment, multiplying under conditions that would destroy immediately any organism made of carbon compounds and dependent on the familiar car bon cycle.
Such creatures might be relics of a past age, many millions of years ago, when their planet was favorable to the origin of life, or they might be immigrants from a favored planet.
Humans on Earth today are characterized by______.
A.their existence as free and separate beings
B.their capability of living under favorable conditions
C.their great power and effectiveness
D.their strong desire for living in a close-knit society
Suicide has been a cause of concern in most societies for a long time. The classical Greeks,for example, required people who wanted to kill themselves to get permission from the senate.
While this law is not without humor by today' s standards, it clearly shows an awareness of the problem in times gone by. In today' s society, suicide is much more prevalent than we want to admit. Why do people try to take their own lives?
(80) The motives for suicide can be categorized into areas such as a failure, wrath (暴怒),the need for attention,stress, and so on. However, the qualities of a person who wants to take his own life change from person to person, making it difficult to depict (描写) the typical vic-tim. To make the problem even more confusing, people will often camouflage (掩盖) their true feelings, thus causing their friends to disregard problems that should be viewed as serious.
In the United States, a network of centers has been created to attempt to prevent suicides.People who are bitter, worried, or depressed are encouraged to contact workers at these centers.These workers, often trained volunteers, offer benevolent advice to the callers, trying to help the callers to see that suicide as a solutions to problems is an illusion. The accomplishments of these centers, insofar(到这个程度 ) as their effectiveness to reduce suicide is concerned, are minimal.
However, they have helped a lot of people with a wide variety of problems. So, in the somewhat amorphous (难以名状的) area of man helping his fellow man, they are certainly a success.
Which of the following statements is TRUE according to the article? 查看材料
A.The classical Greeks did not know the existence of suicide.
B.Suicide has always been prevalent in all parts of the world.
C.In today" s society, there are quite a number of people who commit suicide.
D.Nowadays suicide is not as common as it was in the past.
A、Introductions of traffic rules.
B、Suggestions on driving in a safe manner.
C、Accounts of traffic accidents.
D、Development of highway transportation.
A、Class is a kind of abstract data type.
B、Data encapsulation is a feature of object-oriented paradigm.
C、Information hiding is a feature of object-oriented paradigm.
D、Encapsulation and information hiding mean that all the components in an object will be totally invisible from outside.
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