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【单选题】
在数据库系统中,对存取权限的定义称为( )。A.
声明
B.
授权
C.
加密
D.
口令
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举一反三
【单选题】If Slovenia were a large country in world trade, then if it imposes a large set of tariffs on its imports, this must
A.
decrease the internal price of imports below the world market rate.
B.
cause retaliation on the part of its trade partners.
C.
harm Slovenia's real income.
D.
improve Slovenia's real income.
E.
improve the real income of its trade partners.
【单选题】If Slovenia were a large country in world trade, then if it instituted a large set of subsidies for its exports, this must
A.
have no effect on its terms of trade.
B.
harm world terms of trade.
C.
harm its terms of trade.
D.
decrease its marginal propensity to consume.
【单选题】If Slovenia were a large country in world trade, then if it instituted a large set of subsidies for its exports, this must ( )
A.
have no effect on its terms of trade.
B.
harm its terms of trade.
C.
harm world terms of trade.
D.
improve its terms of trade.
【简答题】假设同一名称的产品有不同的型号和产地，则计算每种产品平均单价的 SQL 语句是 A)SELECT 产品名称 ,AVG( 单价 ) FROM 产品 GROUP BY 单价 B)SELECT 产品名称 ,AVG( 单价 ) FROM 产品 ORDER BY 单价 C)SELECT 产品名称 ,AVG( 单价 ) FROM 产品 ORDER BY 产品名称 D)SELECT 产品名称 ,AVG( 单价 ...
【单选题】If Slovenia were a large country in world trade, then if it instituted a large set of subsidies for its exports, this must
A.
harm its terms of trade.
B.
have no effect on its terms of trade.
C.
improve its terms of trade.
D.
decrease its marginal propensity to consume.
E.
harm world terms of trade.
【单选题】茶树是生长在( ) 的常绿阔叶木本植物。 @font-face { font-family: "Times New Roman";}@font-face { font-family: "宋体";}@font-face { font-family: "Calibri";}@font-face { font-family: "微软雅黑";}p.MsoNormal { margin: 0pt 0...
A.
热带 @font-face { font-family: "Times New Roman";}@font-face { font-family: "宋体";}@font-face { font-family: "Calibri";}@font-face { font-family: "微软雅黑";}p.MsoNormal { margin: 0pt 0pt 0.0001pt; text-align: justify; font-family: Calibri; font-size: 10.5pt; }span.msoIns { text-decoration: underline; color: blue; }span.msoDel { text-decoration: line-through; color: red; }div.Section0 { }
B.
温带 @font-face { font-family: "Times New Roman";}@font-face { font-family: "宋体";}@font-face { font-family: "Calibri";}@font-face { font-family: "微软雅黑";}p.MsoNormal { margin: 0pt 0pt 0.0001pt; text-align: justify; font-family: Calibri; font-size: 10.5pt; }span.msoIns { text-decoration: underline; color: blue; }span.msoDel { text-decoration: line-through; color: red; }div.Section0 { }
C.
寒带 @font-face { font-family: "Times New Roman";}@font-face { font-family: "宋体";}@font-face { font-family: "Calibri";}@font-face { font-family: "微软雅黑";}p.MsoNormal { margin: 0pt 0pt 0.0001pt; text-align: justify; font-family: Calibri; font-size: 10.5pt; }span.msoIns { text-decoration: underline; color: blue; }span.msoDel { text-decoration: line-through; color: red; }div.Section0 { }
D.
亚热带 @font-face { font-family: "Times New Roman";}@font-face { font-family: "宋体";}@font-face { font-family: "Calibri";}@font-face { font-family: "微软雅黑";}p.MsoNormal { margin: 0pt 0pt 0.0001pt; text-align: justify; font-family: Calibri; font-size: 10.5pt; }span.msoIns { text-decoration: underline; color: blue; }span.msoDel { text-decoration: line-through; color: red; }div.Section0 { }
【单选题】假设同一名称的产品有不同的型号和产地，则计算每种产品平均单价的SQL语句是( )。
A.
SELECT 产品名称，AVG(单价)FROM 产品 GROUP BY 单价
B.
SELECT 产品名称，AVG(单价)FROM 产品 ORDER BY 单价
C.
SELECT 产品名称，AVG(单价)FROM 产品 ORDER BY 产品名称
D.
SELECT 产品名称，AVG(单价)FROM 产品 GROUP BY 产品名称
【单选题】患者,男,43岁,因不慎从高处坠落造成腰椎骨折,脊髓挫裂伤,损伤平面以下运动功能丧失,不能中继续进行康复训练。患者能正常交流,但常与家人发脾气,时而封闭自己,拒绝同事探望。该患者的护理诊断不包括( )
A.
躯体功能障碍
B.
语言功能障碍
C.
有皮肤完整性受损的危险
D.
精神困扰
E.
自尊紊乱
【单选题】If Slovenia were a large country in world trade, then if it instituted a large set of subsidies for its exports, this must
A.
improve the real income of its trade partners.
B.
cause retaliation on the part of its trade partners.
C.
harm Slovenia's real income.
D.
improve Slovenia's real income.
E.
increase internal prices above the world market rate.
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