单选题Human vision, like that of other primates, has evolved in an arboreal environment. In the dense, complex world of a tropical forest, it is more important to see well than to develop an acute sense of smell. In the course of evolution, members of the primate line have acquired large eyes while the snout has shrunk to give the eye an unimpeded view. Of mammals, only humans and some primates enjoy color vision. The red flag is black to the bull. Horses live in a monochrome world. Light visible to human eyes, however, occupies only a very narrow band in the whole electromagnetic spectrum. Ultraviolet rays are invisible to humans, though ants and honeybees are sensitive to them. Humans have no direct perception of infrared rays, unlike the rattlesnake, which has receptors tuned in to wavelengths longer than 0.7 micron. The world would look eerily different if human eyes were sensitive to infrared radiation. Then, instead of the darkness of night we would be able to move easily in a strange, shadowless world where objects glowed with varying degrees of intensity. But human eyes excel in other ways. They are, in fact, remarkably discerning in color gradation. The color sensitivity of normal human vision is rarely surpassed even by sophisticated technical devices.

单选题Henry took a bus and headed home, ______ if his wife would have him back.

单选题The judge ruled that the evidence was inadmissible on the grounds that it was ______ to the issue at hand.

单选题Some esoteric fonts used by today"s artists emulate monks who copied medieval manuscripts by hand.

单选题The chairman suggested that everyone be present at the meeting ______ tomorrow morning.

单选题It has been recognized that the causes of premature births are multifarious, and it has been speculated that environmental______, such as stress, fear, exile, and inadequate prenatal maternal care, contribute to the rate of premature births.

单选题Words fail to______our feelings of great reverence for the hero.

单选题It advocated by the book that a man, no matter how______ his origin may be, can be successful with unremitting efforts and strong will.

单选题Yet the difference in tone and language must strike us, so soon as it is philosophy that speaks; that change should remind us that even if the function of religion and that of reason coincide, this function is performed in the two cases by very different organs. Religions are many, reason one. Religion consists of conscious ideas, hopes, enthusiasms, and objects of worship; it operates by grace and flourishes by prayer. Reason, on the other hand, is a mere principle or potential order, on which indeed we may come to reflect but which exists in us ideally only, without variation or stress of any kind. We conform or do not conform to it; it does not urge or chide us, not call for any emotions on our part other than those naturally aroused by the various objects which it unfolds in their true nature and proportion. Religion brings some order into life by weighting it with new materials. Reason adds to the natural materials only the perfect order which it introduces into them. Rationality is nothing but a form, an ideal constitution which experience may more or less embody. Religion is a part of experience itself, a mass of sentiments and ideas. The one is an inviolate principle, the other a changing and struggling force. And yet this struggling and changing force of religion seems to direct man toward something eternal. It seems to make for an ultimate harmony within the soul and for an ultimate harmony between the soul and all that the soul depends upon. Religion, in its intent, is a more conscious and direct pursuit of the Life of Reason than is society, science, or art, for these approach and fill out the ideal life tentatively and piecemeal, hardly regarding the goal or caring for the ultimate justification of the instinctive aims. Religion also has an instinctive and blind side and bubbles up in all manner of chance practices and intuitions; soon, however, it feels its way toward the heart of things, and from whatever quarter it may come, veers in the direction of the ultimate. Nevertheless, we must confess that this religious pursuit of the Life of Reason has been singularly abortive. Those within the pale of each religion may prevail upon themselves, to express satisfaction with its results, thanks to a fond partiality in reading the past and generous draughts of hope for the future; but any one regarding the various religions at once and comparing their achievements with what reason requires, must feel how terrible is the disappointment which they have one and all prepared for mankind. Their chief anxiety has been to offer imaginary remedies for mortal ills, some of which are incurable essentially, while others might have been really cured by well-directed effort. The Greek oracles, for instance, pretended to heal out natural ignorance, which has its appropriate though difficult cure, while the Christian vision of heaven pretended to be an antidote to our natural death — the inevitable correlate of birth and of a changing and conditioned existence. By methods of this sort little can be done for the real betterment of life. To confuse intelligence and dislocate sentiment by gratuitous fictions is a short-sighted way of pursuing happiness. Nature is soon avenged. An unhealthy exaltation and a one-sided morality have to be followed by regrettable reactions. When these come, the real rewards of life may seem vain to a relaxed vitality, and the very name of virtue may irritate young spirits untrained in and natural excellence. Thus religion too often debauches the morality it comes to sanction and impedes the science it ought to fulfill. What is the secret of this ineptitude? Why does religion, so near to rationality in its purpose, fall so short of it in its results? The answer is easy; religion pursues rationality through the imagination. When it explains events or assigns causes, it is an imaginative substitute for science. When it gives precepts, insinuates ideals, or remoulds aspiration, it is an imaginative substitute for wisdom — I mean for the deliberate and impartial pursuit of all good. The condition and the aims of life are both represented in religion poetically, but this poetry tends to arrogate to itself literal truth and moral authority, neither of which it possesses. Hence the depth and importance of religion becomes intelligible no less than its contradictions and practical disasters. Its object is the same as that of reason, but its method is to proceed by intuition and by unchecked poetical conceits.

单选题As he took his foot off the clutch the ear ______ forward and the passenger was almost thrown through the windscreen.

单选题Lousia may Alcott' s novel Little Women, which {{U}}recounts{{/U}} the experiences of the four march sisters during the American civil war, is largely autobiographical. A. praises B. narrates C. exaggerates D. classifies

单选题______, I am a little shy. A. To tell you the truth B. Telling you the truth C. To be told the truth D. Being told the truth

单选题Far from being______, Pat was always______to appear acquiescent.

单选题The basic theory of government rests on the assumption that men have naturally ______ interests.

单选题When the professor is engaged in a specific writing task, nobody and nothing can ______ him from the work he is engaged in, for he is totally absorbed in the job.

单选题______it may seem, gun ownership is declining over all in the United States — nearly a third of American households having an adult with a gun, which is down from nearly half of households in 1973.

单选题When the young man realized that the police had spotted him, he made ______ the exit as quickly as possible, only to find that two policemen were waiting outside.

单选题As the director can't come to the reception, I'm representing the company______.

单选题Pocahonta, a seventeenth century Powhatan Indian, went to the Jamestown colony as her father's emissary.

单选题By the year 2030, it's estimated that more than two thirds of the world's population will be living in cities —______today.