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【简答题】
设有X上的关系R 1 、R 2 、R 3 ，试证： (1)如 ，则 ； (2)如 ．则 ；
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反馈参考答案：
举一反三
【单选题】对《围城》故事情节叙述有误的一项是:
A.
方鸿渐在欧洲留学四年，最后买了一个假的哲学博士学位回国
B.
方鸿渐刚回国时，在银行做职员
C.
方鸿渐后来和赵辛楣一起到刚成立的三闾大学任教
D.
方鸿渐因为受不了三闾大学中人人勾心斗角、互相排挤的 不良风气而辞职
【单选题】Britain’s poor economic performance was a cause for the growing public ( ).
A.
concerns
B.
concern
C.
concerned
D.
concerning
【简答题】Britain’s poor economic performance was a cause for the growing public ________.
【单选题】Which of the following is an idea held by Jonathan Portes?
A.
Britain's poor growth performance was due to fiscal austerity.
B.
His findings are not suitable for the countries like the UK.
C.
Most EU countries should raise their debt-to-GDP ratios.
D.
EU countries should rely on fiscal austerity to avoid depression.
【单选题】Britain’s poor economic performance was acause for the growing public ________.
A.
concern
B.
concert
C.
conceal
D.
concise
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