A major reason for conflict in the animal world is territory. The male animal 1 an area. The size of the area is sufficient to provide food for him, his 2 and their offspring. Migrating birds, for example, 3 up the best territory in the order of "first come, first 4 ." The late arrivals may acquire 5 territories, but less food is available, or they are too close to the 6 of the enemies of the species. 7 there is really insufficient food or the danger is very great, the animal will not 8 . In this way, the members of the species which are less fit will not have offspring. When there is conflict 9 . territory, animals will commonly use force, or a 10 of force, to decide which will stay and which will go. It is interesting to note, however, that animals seem to use 11 the minimum amount of force 12 to drive away the intruder. There is usually no killing. In the 13 of those animals which are capable of doing each other great harm, 14 is a system for the losing animal to show the winning animals that he 15 to submit. When he shows this, the 16 normally stops fighting. Animals (especially birds), which can easily escape from conflict seem to have 17 obstacle against killing, and equally no mechanism 18 submission. The losing bird simply flies away. However, if two doves are 19 in a cage, and they start fighting, they will continue to fight until one kills the other. We all think of the dove as a symbol of peace and, in its natural habitat, it is peaceful. But the "peace" mechanism does not 20 in a cage.
A. in
B. for
C. with
D. by
passage oneRacket, din clamor, noise, whatever you want to call it,unwanted sound is America’s most widespread nuisance. Butnoise is more than just a nuisance. It constitutes a real andpresent danger to people’s health. Day and night, at home, atwork, and at play, noise can produce serious physical andpsychological stress. No one is immune to this stress. Thoughwe seem to adjust to noise by ignoring it, the ear, in fact, nevercloses and the body still responds—sometimes with extremetension, as to a strange sound in the night. The annoyance we feel when faced with noise is the most common outward symptom of thestress building up inside us. Indeed, because irritability is so apparent, legislators have madepublic annoyance the basis of many noise abatement programs. The more subtle and moreserious health hazards associated with stress caused by noise traditionally have been given muchless attention. Nevertheless, when we are annoyed or made irritable by noise, we should considerthese symptoms fair warning that other thing may be happening to us, some of which may bedamaging to our health. Of many health hazards to noise, hearing loss is the most clearly observable and measurable byhealth professionals. The other hazards are harder to pin down. For many of us, there may be arisk that exposure to the stress of noise increases susceptibility to disease and infection. The moresusceptible among us may experience noise as a complicating factor in heart problems and otherdiseases. Noise that causes annoyance and irritability in health persons may have seriousconsequences for these already ill in mind or body. Noise affects us throughout our lives. For example, there are indications of effects on the unbornchild when mothers are exposed to industrial and environmental noise. During infancy andchildhood, youngsters exposed to high noise levels may have trouble falling asleep and obtainingnecessary amounts of rest. Why, then, is there not greater alarm about these dangers Perhaps it is because the link betweennoise and many disabilities or diseases has not yet been conclusively demonstrated. Perhaps it isbecause we tend to dismiss annoyance as a price to pay for living in the modern world. It may alsobe because we still think of hearing loss as only an occupational hazard. Which of the following best states the main idea of the passage
A. Noise is a major problem; most people recognize its importance.
B. Although noise can be annoying, it is not a major problem.
C. Noise is a major problem and has not yet been recognized as such.
D. Noise is a major problem about which nothing can be done.
论说文:根据以下材料,自拟题目写一篇700字左右的论说文。 一天,一位成功学大师在开始演讲之前,问在座的学员:“世界的最高峰是哪一座山”“珠穆朗玛峰。”学员们异口同声地回答说。“它的海拔究竟有多高”“过去是8848米,现在是8844米。”虽然“8844米”是最近才公布的数据,但学员们仍然异口同声地回答说。“那么,世界上的第二高峰是哪一座山”这一问,把绝大部分的学员都问得面面相觑,虽然过了一会儿,台下稀稀落落地开始有人试图回答,但几乎没有人能说得准的,等到成功学大师再问“它的海拔有多高”时,台下就更是鸦雀无声了。 “好,我今天的演讲就从这里开始。”成功学大师深有感慨地说。
passage oneRacket, din clamor, noise, whatever you want to call it,unwanted sound is America’s most widespread nuisance. Butnoise is more than just a nuisance. It constitutes a real andpresent danger to people’s health. Day and night, at home, atwork, and at play, noise can produce serious physical andpsychological stress. No one is immune to this stress. Thoughwe seem to adjust to noise by ignoring it, the ear, in fact, nevercloses and the body still responds—sometimes with extremetension, as to a strange sound in the night. The annoyance we feel when faced with noise is the most common outward symptom of thestress building up inside us. Indeed, because irritability is so apparent, legislators have madepublic annoyance the basis of many noise abatement programs. The more subtle and moreserious health hazards associated with stress caused by noise traditionally have been given muchless attention. Nevertheless, when we are annoyed or made irritable by noise, we should considerthese symptoms fair warning that other thing may be happening to us, some of which may bedamaging to our health. Of many health hazards to noise, hearing loss is the most clearly observable and measurable byhealth professionals. The other hazards are harder to pin down. For many of us, there may be arisk that exposure to the stress of noise increases susceptibility to disease and infection. The moresusceptible among us may experience noise as a complicating factor in heart problems and otherdiseases. Noise that causes annoyance and irritability in health persons may have seriousconsequences for these already ill in mind or body. Noise affects us throughout our lives. For example, there are indications of effects on the unbornchild when mothers are exposed to industrial and environmental noise. During infancy andchildhood, youngsters exposed to high noise levels may have trouble falling asleep and obtainingnecessary amounts of rest. Why, then, is there not greater alarm about these dangers Perhaps it is because the link betweennoise and many disabilities or diseases has not yet been conclusively demonstrated. Perhaps it isbecause we tend to dismiss annoyance as a price to pay for living in the modern world. It may alsobe because we still think of hearing loss as only an occupational hazard. The author’s attitude toward noise would best be described as ___.
A. unrealistic
B. traditional
C. concerned
D. hysterical