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A) thoughB) ifC) asD) unless
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【B5】
A．GenerallyB．AlmostC．HardlyD．Not -
Which of the following best represents Mr. Westhusin’s attitude toward cloning？［A］ Animal cloning is a stupid attempt.［B］ Human cloning is not yet close to getting it worked out.［C］ Cloning is too inefficient and should be stopped.［D］ Animals cloning yes, and human cloning at least not now.
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假设某消费者对商品X、Y的效用函数是U(X，Y)=5X+5Y，X的价格为10，Y的价格为5，则下列说法正确的是()
A．X、Y是完全互补品B．商品Y的恩格尔曲线的位置与X的价格无关C．商品Y的恩格尔曲线的位置同时取决于X与Y的价格D．以上说法都不正确 -
Sometimes the biggest changes in society are the hardest to spot precisely because they are hiding in plain sight. It could well be that way with wireless communications. Something that people think of as just another technology is beginning to show signs of changing lives, culture, politics, cities, jobs, even marriages dramatically. In particular, it will usher in a new version of a very old idea: nomadism.Futurology is a dangerous business, and it is true that most of the important arguments about mobile communications at the moment are to do with technology or regulation—bandwidth, spectrum use and so on. Yet it is worth jumping ahead and wondering what the social effects will be, for two reasons. First, the broad technological future is pretty clear: there will be ever faster cellular networks, and many more gadgets to connect to these networks. Second, the social changes are already visible: parents on beaches waving at their children while typing furtively on their BlackBerrys; entrepreneurs discovering they don"t need offices after all. Everybody is doing more on the move.Wireless technology is surely not just an easier-to-use phone. The car divided cities into work and home areas; wireless technology may mix them up again, with more people working in suburbs or living in city centers. Traffic patterns are beginning to change again: the rush hours at 9am and 5pm are giving way to more varied patterns, with people going backwards and forwards between the office, home and all sorts of other places throughout the day. Already, architects are redesigning offices and universities, more flexible spaces for meeting people, fewer private enclosures for sedentary work.Will it be a better life？ In some ways, yes. Digital nomadism will liberate ever more knowledge workers from the cubicle prisons as depicted in Mr. Dilbert"s cartoons. But the old tyranny of place could become a new tyranny of time, as nomads who are "always on" all too often end up— mentally—anywhere but here. As for friends and family, permanent mobile connectivity could have the same effect as nomadism: it might bring you much closer to family and friends, but it may make it harder to bring in outsiders. Sociologists fret about constant e-mailers and texters losing the everyday connections to casual acquaintances or strangers sitting next to them in the cafe or on the Bus.The same tools have another dark side, turning everybody into a fully equipped paparazzo. Some fitness clubs have started banning mobile phones near the treadmills and showers lest exercising people find themselves pictured, flabby and sweaty, on some website. As in the desert, so in the city: nomadism promises the heaven of new freedom, but it also signals the hell of constant surveillance by the tribe.We can infer from the first two paragraphs that______.
A．social changes are complex in natureB．people may ignore wireless communications changesC．nomadism is nothing new in societyD．everybody can work outside their offices -
利率和收入的组合点出现在IS曲线右上方，LM曲线的左上方区域中，则表示()
A．投资小于储蓄且货币需求小于货币供给B．投资小于储蓄且货币需求大于货币供给C．投资大于储蓄且货币需求小于货币供给D．投资大于储蓄且货币需求大于货币供给