单选题（中南大学2007年试题） The normal human daily cycle of activity is of some 7~8 hours' sleep【1】with some 16-—17 hours' wakefulness and that the sleep normally coincides【2】the hours of darkness. Our present【3】is with how easily and to what extent this【4】can be modified. The question is no mere academic one. The ease with【5】people can change from working in the day to working at night is a【6】of growing importance in industry where automation【7】round-the-clock working of machines. It normally【8】from five days to one week for a person to adapt to a【9】routine of sleep and wakefulness, sleeping【10】the day and working at night.【11】it is often the case in industry that shifts are changed every week. This【12】that no sooner has he got used to one routine【13】he has to change to another,【14】much of his time is spent neither working nor sleeping very【15】One answer would seem to be【16】periods on each shift, a month, or even three months.【17】, recent research has shown that people on such systems will revert to go back to their【18】habits of sleep and wakefulness during the week-end and that this is quite enough to destroy any【19】to night work built up during the week. The only real solution appears to be to hand over the night shift to those permanent night workers whose【20】may persist through all week-ends and holidays.

单选题The World War II ended during Truman's ______.

单选题Their ______ -- that their project under way was something entirely new proved to be untrue.

单选题The social worker claimed that it was impossible for the old man to live on his_____pension.

单选题He passed ______ hours in the library; he acquired information relative to the subject he was going to expound.

单选题 The biosphere is the name biologists give to the sort of skin on the surface of this planet that is inhabitable by living organisms. Most land creatures occupy only the interface between the atmosphere and the land; birds extend their range for a few hundred feet into the atmosphere; burrowing invertebrates (无脊椎动物) such as earthworms may reach a few yards into the soil but rarely penetrate farther unless, it has been recently disturbed by men. Fish cover a wider range, from just beneath the surface of the sea to those depths of greater than a mile inhabited by specialized creatures. Fungi (真菌) and bacteria are plentiful in the atmosphere to a height of about half a mile, blown there by winds from the lower air. Balloon exploration of the stratosphere (同温 层) as long ago as 1936 indicated that moulds and bacteria could be found at heights of several miles, recently the USA's National Aeronautics and Space Administration has detected them, in decreasing numbers, at heights up to eighteen miles. They are pretty sparse at such levels, about one for every two thousand cubic feet, compared with 50 to 100 per cubic foot at two to six miles (the usual altitude of jet aircraft), and they are almost certainly in an inactive state. Marine bacteria have been detected at the bottom of the deep Pacific trench, sometimes as deep as seven miles; they are certainly not inactive. Living microbes have also been obtained on land from cores of rock drilled (while prospecting for oil) at depths of as much as 1,200 feet. Thus we can say, disregarding the exploits of astronauts, that the biosphere has a maximum thickness of about twenty-five miles. Active living processes occur only within a compass of about seven miles, in the sea, on land and in the lower atmosphere, but the majority of living creatures live within a zone of a hundred feet or so. If this planet were sealed down to the size of an orange, the biosphere, at its extreme width, would occupy the thickness of the orange-colored skin, excluding the pith. In this tiny zone of our planet takes place the multitude of chemical and biological activities that we call life. The way in which living creatures interact with each other, depend on each other or compete with each other, has fascinated thinkers since the beginning of recorded history. Living things exist in a fine balance which is often taken for granted, from a practical point of view, things could not be otherwise. Yet it is a source of continual amazement to scientists because of its intricacy and delicacy. The balance of nature is obvious most often when it is disturbed. Yet even here it can seem remarkable how quickly it readjusts itself to a new balance after a disturbance. The science of ecology--the study of the interaction of organisms with their environment--has grown up to deal with the minutiae of the balance of nature.

单选题There is only one difference between an old man and a young one. the young one has a glorious future before him and the old one has a______future behind him.

单选题Bruce Catton would probably agree that we should know history because______.

单选题______ what is generally believed, the adjustment to this kind of work is quite easy.

单选题The author argues that color matters because it is ______.

单选题Children tend to ______ while playing, even if they make a promise before. A. lose all count of time B. keep all count of time C. be aware of the passage of time D. waste time

单选题They agreed to take their disputes before the committee and______by its decisions.

单选题She accidentally swallowed the poison and death was______(2004年湖北省考博试题)

单选题Some of the plan's {{U}}provisions{{/U}} have already aroused opposition, most notably from Pope John Paul Ⅱ.

单选题Helen was s6 persistent that her husband ______ at last.

单选题The purpose of a ______ is to cut down imports in order to protect domestic industry and workers from foreign competition.

单选题The______of two houses proved such a financial burden that they were forced to sell one.

单选题According to the article, which one of the following statements is NOT true?

单选题The Coriolis force causes all moving projectiles on Earth to be ______ from a straight line.

单选题Yeats was beginning to use a vocabulary freshly minted from the treasury of Gaelic literature, and many of the shorter poems in The Countess Kathleen and Various Legends and Lyrics (1892) deal with a mythology Ireland had well nigh forgotten and England never known. For Arthur and his Round Table Yeats substituted the very different Conchubar and his Red Branch Warriors, and Finn and his Fenians. The Red Branch cycle of legends included Fergus, whom Ness had tricked out of his kingdom so that her son Conchubar could rule over Ulster in his stead, and in Fergus and the Druid Yeats makes him avid for dreaming wisdom. Fergus was the unwitting agent of the doom of the Sons of Usna, Naoise the lover of Deirdre and his brothers Ardan and Ainle, who had accompanied the lovers to Scotland when they fled from Conchubar's wrath, for Deirdre was Conchubar's intended bride. Fergus had persuaded them to return against the wishes of Deirdre and had been tricked out of acting as their safe conduct. He joined with Maeve, Queen of Connaught, after this, in her raid on Ulster, in which Cuchulain achieved his great fame as Ulster's champion. Cuchulain is the Achilles of the Irish Saga, and he appears throughout Yeats's plays and poems, as warrior, as husband of Emer, as lover of Eithne Inguba, and of Aoife, as the unknowing killer of his own son and finally as victim of the sea.