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【单选题】
在关系模型的完整性约束中，实体完整性规则是指关系中__（1）__，而参照完整性（即引用完整性）规则要求__（2）__。空白（1）处（）
A.
属性值不允许重复
B.
属性值不允许为空
C.
主键值不允许为空
D.
外键值不允许为空
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举一反三
【单选题】____ to a ruling by the German Federal Court of Justice in August 2012, air travelers are not entitled to compensation payments if their flight is delayed due to a strike.
A.
accord
B.
because
C.
according
D.
accordingly
查看完整题目与答案
【单选题】某患者于平卧时频发胸痛，心电图相关导联的 ST 段抬高，诊断为变异性心绞痛，应选哪种药
A.
普萘洛尔
B.
硝苯地平
C.
地高辛
D.
华法林
E.
阿司匹林
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【判断题】Jim studied business and management at college.
A.
正确
B.
错误
查看完整题目与答案
【简答题】完形填空（共20小题；每小题1.5分，满分30分） 请阅读下面短文，掌握其大意，然后从36～55各题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该选项的标号涂黑。 We will meet a lot of crossings on the way of our lives．How to choose? The son of a brewer (酿造商), Jim Koch, ...
查看完整题目与答案
【判断题】309( ) 两用型翻驳领制图方法与开门领的作图方法相同。
A.
正确
B.
错误
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【单选题】Jim studied ______ at college.
A.
public speaking
B.
communication
C.
business and management
D.
broadcasting
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【单选题】In September 2012 unemployment was high and the Fed was concerned that the economy would re-enter a recession. Therefore the Fed announced it would ( ) its purchases of securities in an effort to ( ...
A.
decrease; keep the federal funds rate low
B.
increase; keep the federal funds rate low
C.
decrease; raise the federal funds rate
D.
increase; raise the federal funds rate
查看完整题目与答案
【单选题】_ to a ruling by the German Federal counter of justice in August 2012 air travelers are not entitled to composation payments if their flight is delayed due to a strike.
A.
Accord.
B.
.Because
C.
According
D.
Accordingly
查看完整题目与答案
【单选题】Which of the following issues prominent in the presidential election of 2012 shifts the aggregate demand curve rightward?
A.
raising taxes on the rich
B.
increasing Medicare, Medicaid, and Social Security payments
C.
loosening immigration policies
D.
allowing more oil drilling on Federal lands
查看完整题目与答案
【单选题】Read the following article about whether recreational marijuana should be legalized and answer the questions.More than half of US adults, over 128 million people, have tried marijuana, despite it bein...
A.
Sequential pattern.
B.
Cause-effect pattern.
C.
Chronological pattern.
D.
Problem-solution pattern.
查看完整题目与答案
相关题目：
【单选题】____ to a ruling by the German Federal Court of Justice in August 2012, air travelers are not entitled to compensation payments if their flight is delayed due to a strike.
A.
accord
B.
because
C.
according
D.
accordingly
查看完整题目与答案
【单选题】某患者于平卧时频发胸痛，心电图相关导联的 ST 段抬高，诊断为变异性心绞痛，应选哪种药
A.
普萘洛尔
B.
硝苯地平
C.
地高辛
D.
华法林
E.
阿司匹林
查看完整题目与答案
【判断题】Jim studied business and management at college.
A.
正确
B.
错误
查看完整题目与答案
【简答题】完形填空（共20小题；每小题1.5分，满分30分） 请阅读下面短文，掌握其大意，然后从36～55各题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该选项的标号涂黑。 We will meet a lot of crossings on the way of our lives．How to choose? The son of a brewer (酿造商), Jim Koch, ...
查看完整题目与答案
【判断题】309( ) 两用型翻驳领制图方法与开门领的作图方法相同。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Jim studied ______ at college.
A.
public speaking
B.
communication
C.
business and management
D.
broadcasting
查看完整题目与答案
【单选题】In September 2012 unemployment was high and the Fed was concerned that the economy would re-enter a recession. Therefore the Fed announced it would ( ) its purchases of securities in an effort to ( ...
A.
decrease; keep the federal funds rate low
B.
increase; keep the federal funds rate low
C.
decrease; raise the federal funds rate
D.
increase; raise the federal funds rate
查看完整题目与答案
【单选题】_ to a ruling by the German Federal counter of justice in August 2012 air travelers are not entitled to composation payments if their flight is delayed due to a strike.
A.
Accord.
B.
.Because
C.
According
D.
Accordingly
查看完整题目与答案
【单选题】Which of the following issues prominent in the presidential election of 2012 shifts the aggregate demand curve rightward?
A.
raising taxes on the rich
B.
increasing Medicare, Medicaid, and Social Security payments
C.
loosening immigration policies
D.
allowing more oil drilling on Federal lands
查看完整题目与答案
【单选题】Read the following article about whether recreational marijuana should be legalized and answer the questions.More than half of US adults, over 128 million people, have tried marijuana, despite it bein...
A.
Sequential pattern.
B.
Cause-effect pattern.
C.
Chronological pattern.
D.
Problem-solution pattern.
查看完整题目与答案