单选题Televisions are now an everyday feature of most households in the United States, and television viewing is the number one activity leisure.
单选题(a)Causesofillness(b)Thediscoveryofantibiotics(c)Thehistoryofprescriptiondrugs(d)Characteristicsofantibiotics
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单选题The word "precarious" in line 1 is closest in meaning to
单选题The word "Ultimately" in line 14 is closest in meaning to
单选题Which of the following terms is defined in the passage?
单选题Why does the author mention "the University of Indiana campus" in line 10-11
单选题1 David Smith worked primarily in iron, exploring its possibilities more fully than any other sculptor before or since. To Smith, iron spoke of the power, mobility, and vigor of the industrial age. Smith was born in Indiana in 1906, the descendant of a nineteenth- century blacksmith. His iron sculptures flowed naturally out of the mechanized heart of America, a landscape of railroads and factories. As a child, Smith played on trains and around factories, as well as in nature on hills and near creeks. He originally wanted to be a painter, but after seeing photographs of the metal sculpture of Picasso in an art magazine, he began to realize that iron could be handled as directly as paint. 2 Many of Smith's sculptures are "totems" that suggest variations on the human figure. They are not large iron dolls, although several have "heads" or "legs." Still, they forcefully convey posture and gesture. Their message flows from the internal relations of the forms and from the impression of tension, spring, and alertness set up by their position in space. 3 Later in his career, Smith produced two series of sculptures in stainless steel: the Sentinels in the 1950s and the Cubis in the 1960s. He also began placing his sculptures outdoors, in natural light, where the highly reflective stainless steel could bring sunlight and color into the work. In the late afternoon sun, the steel planes of the Cubis reflect a golden color; at other times, they have a blue cast. The mirror-like steel creates an illusion of depth, which responds better to sunshine than it would to the static lighting of a museum.
单选题A children's librarian (often conducts) story hours and other activities(to help)children enjoy (herself) while developing an (interest) in reading and the library's resources.
单选题What aspect of North America does the passage mainly discuss?
单选题What aspect of ants does the passage mainly discuss?
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单选题The word "preserved" in line 8 is closest in meaning to
单选题Stars shine because of _______ produced by the nuclear reactions taking place within them.
单选题The physical universe is governed by law that demand the continuous increase of
A B C D
entropy or disorder.
单选题Listentopartofaconversationbetweentwostudents.Nowgetreadytoanswerthequestions.Youmayuseyournotestohelpyouanswer.
单选题1 Archaeology is the study of prehistoric and historic cultures through the analysis of material remains. Archaeologists interpret the past from the objects made by past peoples. Often these objects lie buried in the ground, so our image of the archaeologist is of a scientist who is always digging. Archaeological digs include ruins of buildings and monuments, and also objects made by people who often had no written language and therefore no other record of their way of life. Tools, weapons, body ornaments, household furnishings, and items used in religious ceremonies are all examples of artifacts that typically turn up in digs. 2 Like historians, archaeologists establish the sequence of events that occurred in a given place and time period. But unlike historians, they take on a time span of roughly half a million years. Archaeologists try not only to piece together what happened in a particular setting but also to fit these small pieces into a much bigger picture. They aim to document how big changes occurred in the way peoples exploited their environment and one another.
单选题The human skin forms-----against the action of physical, chemical, and bacterial agents on the deeper tissues.
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单选题The word "transition" in line 23 is closest in meaning to