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某生产企业为增值税一般纳税人,2009年2月把资产盘点过程中将不需用的部分资产进行处理:销售已经使用4年的机器设备,取得收入9200元(原值为9000元);销售自己使用过的应交消费税的机动车2辆,分别取得收入11000元(原值为40000元)和64000元(原值为56000元);销售给小规模纳税入库存未使用的钢材取得收入35000元,该企业上述业务应纳增值税为( )元。(以上收入均为含税收入)

A. 6916.24
B. 5594.70
C. 6493.16
D. 6316.24

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下列命令执行后的结果是______。 STORE-100 TO X SIGN(X)*SQRT(ABS(X))

假设图书管理数据库中有3个表,图书.dbf、读者.dbf和借阅.dbf。它们的结构分别如下: 图书(总编号C(6),分类号C(8),书名C(16),出版单位C(20),单价N(6,2)) 读者(借书证号C(4),单位C(8),姓名C(6),性别C(2),职称C(6),地址C(20)) 借阅(借书证号C(4),总编号C(6),借书日期D(8)) 在上述图书管理数据库中,图书的主索引是总编号,读者的主索引是借书证号,借阅的主索引应该是______。

The new prestige of the British graduates is the most spectacular because in the past Britain has been much 【B1】 interested in universities and degrees than other advanced countries — or even some backward 【B2】 . In 1901 Ramsay Muir observed that Britain had 【B3】 universities per head than any other civilized country in Europe except Turkey. A UNESCO survey in 1967 【B4】 Britain was still close to the bottom in Europe, in 【B5】 of the proportion of the age-group from twenty to twenty-four who were enrolled in 【B6】 education. Most continental countries in the 【B7】 decade have expanded their higher education faster than Britain. University statistics are notoriously difficult to compare, because of the different implications of the word "student" ; in most continental countries anyone who 【B8】 his final school exam — the baccalaureate — is entitled to go into the university on the principle of "let him pass" ; but he has 【B9】 guarantees of tuition or personal attention. Partly as a result there are far more drop-outs and "ghost students" ; in France half the students never become graduates. A comparison of graduates, as opposed 【B10】 students, shows Britain in 【B11】 favorable light, for most British students take a degree. 【B12】 even in terms of graduates, Britain is still 【B13】 in the Europe league. Going to university is a much more solid ambition among the sons of the bourgeoisie in France or Germany than in 【B14】 ; many of the British middle-classes — 【B15】 the shopkeepers and small-business men — have tended to be skeptical, if 【B16】 actually hostile, to university education for their children, and there are still rich and quite intelligent parents who will prefer their children to go straight 【B17】 school into the city, to the army 【B18】 to farming. But the attractions of a BA or 【B19】 MA have penetrated into areas, 【B20】 among the rich and the poor, where they would not have been felt twenty years ago; and they are far-reaching.

设关系模式R上函数依赖集F=A->B,B->C,C->A,则F的最小函数依赖集F1= ______。

A. {A->B,B->C }
B. {B->C,C->A}
C. { A->B,B->C,C->A}
D. {A->B,C->A}

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