单选题There are generally three kinds of sense relations recognized, namely, sameness relation, oppositeness relation and ______ relation.

单选题Many reasons have been adduced for the rise of the Leica. There is the hectic progress of the illustrated press, avid for photographs to fill its columns; there is the increased mobility, spending power, and leisure time of the middle class, who wished to preserve a record of these novel blessing, if not for posterity, then at least for show. Yet the great inventions, more often than not, are triggered less by vast historical movements than by the pressures of individual change—or in Leica"s case, by asthma. Every Leica employee who drives down Oscar-Barnack-Strasse is reminded of corporate glory, for it was Barnack, a former engineer at Carl Zeiss, the famous lens makers in Jena, who designed the Leica I. He was an amateur photographer, and the camera had first occurred to him, as if in a vision, in 1905, twenty years before it actually went on sale; "Back then I took pictures using a camera that tool 13 by 18 plates, with six double-plate holders and a large leather case similar to a salesman"s sample case. This was quite a load to haul around when I set off each Sunday through the Thuringer Wald, while I struggled up the hillsides(bearing in mind that I suffer from asthma)an idea came to me. Couldn"t this be done differently?" Five years later, Barnack was invited to work for Ernst Leitz, a rival optical company, in Watzlar.(The company stayed there until 1988, when it was sold, and the camera division, renamed Leica, shifted to Solms, fifteen minutes away.)By 1909-14, he had developed what became known as the ur-Leica; a tough, squat rectangular metal box, not much bigger than a spectacles case, with rounded corners and a retractable brass lens. You could tuck it into a jacket pocket, wander around the Thuringer woods all weekend, and never gasp for breath. The extraordinary fact is that, if you were to place it next to today"s Leica MP, the similarities would far outweigh the differences; stand a young man beside his own great-grand father and you get the same effect. Barnack took a picture on August 2, 1914, using the new device. Reproduced in Alessandro Pasi"s comprehensive study Leica: Witness to a Century(2004), it shows a helmeted soldier turning away from a column on which he has just plastered the imperial order for mobilization. This was the first hint of the role that would fall to Leica above all other cameras; to be there in history"s face. Not until the end of the hostilities did Barnack resume work on the Leica, as it came to be called.(His own choice of name was Lilliput, but wiser counsels prevail. Whenever you buy a 35-milimeter camera, you pay homage to Barnack.)

单选题Sheep, cattle and antelope are______, unlike dogs and cats, they show no interest in meat.

单选题By "Ellen Spero isn' t biting her nails just yet" (Line 1, Paragraph 1), the author means ______.

单选题This is one reason A why change has not come B more quickly to black Americans as C compared to other American minorities, D because the sharp difference in appearance between them and their white counterparts.

单选题George Ball______malaria when he was touring Mexico.

单选题Which ONE of the following is the author of The Leather-Stocking Tales?

单选题Even before the train had come to a stop, the massive onslaught of bodies engulfed us from all sides.

单选题______mechanical device has ever been invented that can satisfactorily replace teasel flower heads for raising the nap on cloth.

单选题The following segmentation of the sentence "The student//likes/the new linguistic professor" truthfully reveals the______nature of sentence structure.

单选题As policymakers rush to implement reforms in response to one financial calamity, they are ______create distortions that pave the way for the next disaster.

单选题The movements of a clock are______and that is why we can use it to measure time.

单选题The 16th century English Renaissance boomed under the reign of______.

单选题Remote terminals in the home make the home the most______place to work in many cases.

单选题Some linguists maintain that a word group is an extension of word of a particular class.（清华2001研)

单选题Queen Victoria was the Monarch of the U. K. during the period from______.

单选题Which ONE of the following literary schools is related with the concepts of determinism?

单选题The goals______he had fought all his life no longer seemed important to him.

单选题"The health program outlined in the article seems very sound to me." "To me, too, but it has______considerable public outcry."

单选题Can you give me a case ______ this phrase can be used?