单选题A serious environmental problem resulting from automobiles is _________.
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单选题Whom are the speakers expecting to come soon?
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单选题Questions 4-7 are based on a talk about Joe"s new neighbors.
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单选题Why does the author mention stuffed drug smugglers?
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单选题 Questions 5 to 7 are based on the following conversation.
单选题Do you believe that some fish can produce electricity strong enough to light a lamp or ______ run a small electric motor? [A] further [B] rather [C] else [D] even
单选题The cohesiveness(内聚力)of a family seems to rely on members sharing certain routine practices and events. For a growing share of the American labor force, however, working shifts beyond the normal daylight hours—what we here call "shift work"—makes the lives of families difficult. Existing research shows that both male and female shift workers express high levels of stress and a sense of conflict between the demands of work and family life. But shift work couples still maintain a traditional attitude to the meaning of marriage and the individual roles of husband and wife. They expressed a willingness to do "whatever it takes" to approximate their view of a proper marriage, including sacrificing sleep and doing conventional things at unconventional hours. For the majority of couples interviewed, even when wives worked outside their homes, a proper marriage is characterized by a very clear division of roles: husbands are "providers" whose major responsibility is to support the family; wives are "homemakers" who clean, cook, and care for husbands and children. The women's definitions of a "good husband" are typified by the following wife's response: I expect him to be a good provider, and be there when I need him, loyal about the same things as he would expect out of me, expect that I expect him to dominate over me. But in a manner of speaking, when it's time to be a man I expect him to stand up instead of sitting back expecting me to do everything. To husbands, a good wife is someone who is: Understanding of what I feel go through at work. I need that respect at work, I hope I get it at work, I want my wife to realize what I expect at work. I don't want her to give me a lot of shit when I come home from work because I don't know if this makes much sense. These views seemed critical to maintain the families of the shift workers.
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单选题The automobile has many advantages. Above all, it offers people freedom to go wherever and whenever they want to go. The basic purpose of a motor vehicle is to get from point A to point B as cheaply, quickly, and safely as possible. However, to most people, cars are also personal fantasy machines that serve as symbols of power, success, speed, excitement, and adventure. In addition, much of the world's economy is built on producing motor vehicles and supplying roads, services, and repairs for those vehicles. Half of the world's paychecks are auto related. In the United States, one of every six dollars spent and one of every six non-farm jobs are connected to the automobile or related industries, such as oil, steel, rubber, plastics, automobile services, and highway construction. In spite of their advantages, motor vehicles have many harmful effects on human lives and on air, water, land, and wildlife resources. The automobile may be the most destructive machine ever invented. Though we tend to deny it, riding in cars is one of the most dangerous things we do in our daily lives. Since 1885, when Karl Benz built the first automobile, almost 18 million people have been killed by motor vehicles. Every year, cars and trucks worldwide kill an average of 250 000 people -- as many as were killed in the atomic bomb attacks on Hiroshima and Nagasaki -- and injure or permanently disable 10 million more. Half of the world's people will be involved in an auto accident at some time during their lives. Since the automobile was introduced, almost three million Americans have been killed on the highways -- about twice the number of Americans killed on the battlefield in all US wars. In addition to the tragic loss of life, these accidents cost American society about $ 60 billion annually in lost income and in insurance, administrative, and legal expenses. Streets that used to be for people are now for cars. Pedestrians and people riding bicycles in the streets are subjected to noise, pollution, stress, and danger. Motor vehicles are the largest source of air pollution, producing a haze of smog over the world's cities. In the United States, they produce at least 50% of the country's air pollution.
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单选题To judge a child's standard, his marks in a test must be compared with marks gained by ______.