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如果银行拒绝支付，D公司作为持票人能否直接向A公司要求赔偿B公司和C公司对票据债务是否负责
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某医院病房信息管理系统需要存储如下信息：·科室：科室名，科室地址，科室电话。·病房：病房号，床位个数。·医生：姓名，职称，年龄，工作证号。·病人：病历号，姓名，性别，诊断说明。其中，一个科室有多个病房、多个医生，一个病房只能属于一个科室，一个医生只属于一个科室，但可负责多个病人的诊治，一个病人的主治医生只有一个，一个病房可以有多个病人，但一个病人只属于一个病房。（1）请绘制该系统的E-R图。（2）将该E-R图转换为关系模式，并标出每个关系模式的主码和外码。
法律体现的是掌握国家政权的统治阶级的意志，归根结底还是体现了统治阶级的根本意志。( )
保管期满但未结清的债权债务原始凭证，经单位负责人批准后可以销毁。( )
Passage Four President Arling has put his long awaited economic restructuring program before the Congress. It provides a coordinated program of investment credits, research grants, education reforms, and tax changes designed to make American industry more competitive. This is necessary to reverse the economic slide into unemployment, lack of growth, and trade deficits that have plagued the economy for the past six years. The most liberal wing of the President’s party has called for stronger and more direct action. They want an income policy to check inflation while federal financing helps rebuild industry behind a wall of protective tariffs. The Republicans, however, decry(谴责) even the modest, graduated tax increases in the President’s program. They want taxcuts and more open market. They say if federal money has to be injected into the economy, let it through defense spending. Both these alternatives ignore the unique nature of the economic problem before us. It is not simply a matter of markets or financing. The new technology allows vastly increased production for those able to master it. But it also threatens those who fail to adopt it with permanent second-class citizenship in the world economy. If an industry cannot lever itself up to the leading stage of technological advances, then it will not be able to compete effectively. If it cannot do this, no amount of government protectionism or access to foreign markets can keep it profitable for long. Without the profits and experience of technological excellence to reinvest, that industry can only fall still further behind its foreign competitors. So the crux(症结) is the technology and that is where the Presidenfs program focused. The danger is not that a plan will not be passed, but it is that the ideolognes(理论家) of right and left will distort the bill with amendments that will blur its focus on technology. The economic restructuring plan should be passed intact. If we fail to restructure our economy now, we may not get a second chance. The passage is most probably______
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