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【简答题】

The bar chart below shows the sales figures of a college bookstore which was broken down into different categories according to the types of items and s. With reference to the chart, write a report of the outstanding features of the sales figures. Write 120—140 words on your Answer Sheet.

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【多选题】下列长期股权投资中( )应当采用成本法核算。

A.
投资企业能够对被投资单位实施控制的长期股权投资
B.
投资企业对被投资单位具有共同控制或重大影响的长期股权投资
C.
投资企业对被投资单位的投资占该单位有表决权资本总额20%以下
D.
投资企业对被投资单位不具有共同控制或重大影响,并且在活跃市场中没有报价、公允价值不能可靠计量的长期股权投资

【单选题】若要求DepID参照部门关系DEP的主码DepID,则可以在定义EMP时用()进行约束。 A.Primary Key(DepID) On DEP(DepID) B.Primary Key(DepID) On EMP(DepID) C.Foreign Key(DepID) References DEP(DepID) D.Foreign Key(DepID) References EMP(DepID)

A.
给定员工关系EMP(EmpID,Ename,sex,age,tel,DepID),其属性含义分别为:员工号、姓名、性别、年龄、电话、部门号;部门关系DEP(DepID,Dname,Dtel,DEmpID),其属性含义分别为:部门号、部门名、电话,负责人号。若要求DepID参照部门关系DEP的主码DepID,则可以在定义EMP时用()进行约束。若要查询开发部的负责人姓名、年龄,则正确的关系代数表达式为()

【单选题】Cooperative cooperation. Competitive cooperation. Confused Airline alliances have travelers scratching their heads over what’’s going on in the skies. Some folks view alliances as a blessing to travel...

A.
It’s beneficial for all the travelers.
B.
It’s beneficial for some travelers.
C.
It’s beneficial for those travelers who fly frequently.
D.
It’s beneficial for those travelers who fly infrequently.