In science the meaning of the word 'explain' suffers with civilization's every step in search of reality. Science cannot really explain electricity, magnetism, and gravitation; their effects can be measured and predicted, but of their nature no more is known to the modern scientist than to Thales who first looked into the nature of the electrification of amber, a hard yellowish-brown gum. Most contemporary physicists reject the notion that man can ever discover what these mysterious forces 'really' arE.Electricity, Bertrand Russell says, 'is not a thing, like St. Paul's Cathedral; it is a way in which things behavE.When we have told how things behave when they are electrified, and under what circumstances they are electrified, we have told all there is to tell.' Until recently scientists would have disapproved of such an ideA.Aristotle, for example, whose natural science dominated Western thought for two thousand years, believe that man could arrive at an understanding of reality by reasoning from self-evident principles. He felt, for example, that it is a self-evident principle that everything in the universe has its proper place, hence one can deduce that objects fall to the ground because that's where they belong, and smoke goes up because that's where it belongs. The goal of Aristotelian science was to explain why things happen. Modem science was born when Galileo began trying to explain how things happen and thus originated the method of controlled experiment which now forms the basis of scientific investigation.The aim of controlled scientific experiments is ______.A.to explain why things happenB.to explain how things happenC.to describe self-evident principlesD.to support Aristotelian scienceA.'B.TheC.A.toD.toE.toF.to

判断题当发现自己前面有人突然摔倒时迅速通过,不要停留。正确错误

未知题型 After Sam Walton died in 1992, one of his sons took over Wal-Mart and it was then greatly expandeD.A.YB.NC.NG

未知题型 By saying 'more inclined to blow the whistle'(ParA.2), the author means that people are more______.A.eager to disclose secretsB.willing to report wrongdoingsC.alert to hidden dangers to the countryD.ready to cooperate with the administration

未知题型 Silence is unnatural to man. He begins life with a cry and ends it in stillness. In the【B1】he does all he can to make a noise in the world, and there are few things of which he stands in more fear than of the【B2】of noisE.Even his conversation is in great【B3】a desperate attempt to prevent a dreadful silencE.If he is introduced to a fellow mortal and a number of【B4】occur in the conversation, he regards himself as a【B5】, a worthless per son, and is full of【B6】of the emptiest headed chatterbox(唠叨多言的人). He knows. that ninety-nine percent of human conversation means no more than the buzzing of a fly,【B7】he longs to join in the buzz and to prove that he is a man and not a wax-work【B8】. The object of conversation is not, for the【B9】part, to communicate ideas: it is to keep up the buzzing sounD.Most buzzing,【B10】, is agreeable to the ear, and some of it is agreeable even to the【B11】. He would be a foolish man,【B12】, who waited until he had a wise【B13】to take part in the buzzing with his neighbors. Those who【B14】the weather as a conversational opening seem to be【B15】of the reason why human beings wish to talk. Very few human beings join in a conversation【B16】the hope of learning anything new. Some of them are【B17】if they are merely allowed to go on making a noise into other people's ears,【B18】they have nothing to tell them except that they have seen a new play. At the end of an evening during which they have said nothing at immense【B19】, they justly pride themselves【B20】their success as conversationalists.【B1】A.lengthB.intervalC.periodD.meantime

单项选择题银行存款清查中发现的未达账项应编制( )来检查调整后的余额是否相等。 A、对账单 B、实存账存对比表 C、盘存单 D、银行存款余额调节表

多项选择题关于双级布置的说法正确的是（）。 A. 与单级布置相比，热风温度可以加热到更高温度 B. 烟气依次经过第二级空气预热器、第二级省煤器、第一级空气预热器、第一级省煤器。 C. 烟气依次经过第二级省煤器、第二级空气预热器、第一级省煤器、第一级空气预热器。 D. 第一级空气预热器常采用回转式空气预热器

未知题型在调节银行存款项目时，应根据从银行获取的银行存款对账单和从丁公司获取的银行存款日记账编制银行存款余额调节表，并对余额调节表上列示的未达账项进行追查，以证实对公司管理层对银行存款项目的各种认定。具体来说，注册会计师通过对“企业已收款、银行未入账的金额”进行追查，除了不能证实( )认定外，能证实其余的三项认定。D.“权利与义务”

单项选择题 216. 若气动功率放大器的放大系数K=10,则( )。 ①输入最大变化量为0.08MPa;②输出的最大变化量为0.08MPa;③输入最大变化量为0.008MPa;④输入为0.002MPa时输出为0.02MPa;⑤输出为0.1MPa时,输入为0.01MPa;⑥输出为0.02MPa是由起步压力决定的。 A、②③⑥ B、①③⑤ C、②④⑥ D、①④⑤

未知题型国有企业改革的方向应该是建立以公有制为主体的现代企业制度。按照产权明晰的要求，企业应有（）。D.行业管理权

单项选择题感染邪毒的发热特点 A、低热起伏 B、寒战高热 C、乍寒乍热 D、恶寒发热