题目

某电站用11KV的交变电压输电，输送功率一定，输电线的电阻为R。现用变压器将电压升高到220KV的超高压送电，下列说法中正确的是A．因，所以输电线上电流增为原来的20倍B．因，所以输电线上电流减为原来的C．因，所以输电线上损失的功率增为原来的400倍D．若要使输电线上损失的功率不变，可将输电线直径减为原来的With the help of Gloria ,his wife ,Tom Peterson worked for many years to build a solid business selling television sets, stereo systems, and home appliances. Tom developed an excellent with their full satisfaction guarantee and friendly service. He was proud of his high percentage (百分率)of repeat .About five years ago, Tom was by the owners of a competing company, Stereo Super Stores. They wanted him to them out. The price was very attractive. Everything looked good. Before making his final ,Tom asked Gloria what she thought about the purchase(购买). She told him that the numbers looked good, it didn't feel to her. However, Tom was so self-confident and so convinced that this was a rare , he went ahead and it. Within months he discovered that he had made a big . He had paid too much for a company. He tried as hard as he could to make it work out, but he couldn't turn things . He was forced into bankruptcy(破产). He was about to lose everything, including his business.Tom was embarrassed, but he is a survivor. He looked at his situation. He decided to admit his mistake and, rather than getting stuck in lawsuits(诉讼), he would focus his on saving and rebuilding his original business. He saw also that he had made a mistake by not listening to his , and that he needed to learn from this .He dealt with the crisis(危机) in a way that delighted people, who in turn respect for him. Old customers poured into his store. He and Gloria _to changes in retailing(零售) and have built an even better business than before.In the business world, it is natural to gain and lose, of Peterson’s experience is an example. Only those who regard their mistakes as gifts and learn from them attract endless profits.1.A. produceB. fameC. causeD. home2.A. customersB. assistantsC. friendsD. visitors3.A. appointedB. approvedC. approachedD. appreciated4.A. sellB. payC. buyD. check5.A.decisionB. choiceC. determinationD. judgement6.A.as thoughB. now thatC. even thoughD. in case7.A.terribleB. fairC. rightD. attractive8.A.possibilityB. occasionC. eventD. opportunity9.A. protectB. madeC. returnD. exchange10.A.differenceB. discoveryC. commitmentD. mistake11.A.dyingB. controversialC. casualD. tiring12.A. inB. aroundC. downD. up13.A .originalB. variousC. specialD. precious14.A.quietlyB. loudlyC. openlyD. secretly15.A. beliefsB. spiritsC. attemptsD. energies16.A. producerB. wifeC. relativeD. adviser17.A. experienceB. progressC. processD. history18.A. wonB. showedC. achievedD. earned19.A.belongedB. adaptedC. adoptedD. appealed20.A. themB. whatC. thatD. which