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A．They eat protein.B．They never move from one location.C．They cause erosion of rocks.D
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If you live in a large city, you are quite familiar with some of the problems of noise, but, because of some of its harmful effects, you may not be aware of the extent of its influence on human behavior. Although everyone more or less knows what noise is, i. e., it is sounds that one would rather not hear, it is perhaps best to define it more precisely for scientific purposes. One such definition is that noise is sounds that are unrelated to the task at band. Thus stimuli (刺激物)that at one time might be considered relevant will at another time to be considered noise, depending on what one is doing at the moment. In recent years there has been a great deal of interest in the effects on human behavior, and concepts such as "noise pollution" have arisen, together with movements to reduce noise.
Exposure to loud noises can definitely produce a partial or complete loss of hearing, depending on the intensity, duration, and frequency composition of the noise. Many jobs present noise hazards (危险), such as working in factories and around jet aircraft, driving farm tractors, and working in music halls where rock bands are playing. In general, continuous exposure to sounds of over 80 decibels can be considered dangerous. Decibel values correspond to various sounds. Sounds above 85 decibels may, if exposure is for a sufficient period of time, produce significant hearing loss. Noise can have unexpected harmful effects on performance of certain kinds of tasks, for instance, if one is performing a watch keeping task that requires vigilance (注意), in which he is responsible for detecting weak signals of some kind (e. g. , watching a radar screen for the appearance of aircraft).
Communicating with other people is unfavorably affected by noise. If you have ridden in the rear of a jet transport, you have noticed that it was difficult to carry on a conversation at first, and that, eventually you adjusted the loudness of your speech to compensate for the effect. The problem is noise.
Noise differs from sound in that ______.
According to the author, even contemporary artists might choose subjects that only provide
Part A
Directions: Read the following three texts. Answer the questions on each text by choosing A, B, C or D. Mark your answers on ANSWER SHEET 1.
In a family where the roles of men and women are not sharply separated and where many household tasks are shared to a greater or less extent, notions of making superiority are hard to maintain. The pattern of sharing in tasks and in decisions makes for equality, and this in turn leads to further sharing. In such a home, the growing boy and girl learn to accept that equality more easily than did their parents and to prepare more fully for participation in a world characterized by cooperation rather than by the "battle of sexes".
If the process goes too far and man's role is regarded as less important, and that has happened in some cases we are as badly as before, only in reverse. It is time to reassess the role of the man in the American family. We are getting a little tired of "Momism", but we don't want to exchange it for a "neo- Popism". What we need, rather, is the recognition that bringing up children involves a partnership of equals. There are signs that psychiatrists, psychologists, social workers, and specialists on the family are becoming more aware of the part men play and that they have decided that women should not receive all the credits nor all the blame. We have almost given up saying that a woman's place is in the home. We are beginning, however, to analyze man's place in the home mid to insist that he does have a place in it. Nor is that place irrelevant to the healthy development of the child. The family is a cooperative enterprise for which it is difficult to lay down rules, because each family needs to work out its own ways for solving its own problems. Excessive authoritarianism has unhappy consequences, whether it wears skirts or trousers, and the idem of equal rights and equal responsibilities is critical to a healthy family.
Sharing tasks and decisions in a family leads to ______.
Which of the following Statements is not true？
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