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【简答题】
在下列各种学习动机中属于内在动机的是 （ ）
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反馈参考答案：
举一反三
【简答题】设一个关系A具有a1个属性和a2个元组，关系B具有b1个属性和b2个元组，则关系AxB具有______个属性和______个元组。
【单选题】It has not been decided who will ______ to the post of chairman of the board, the former holder of which succeeded ______the company world famous. [ ]
A.
hold; to make
B.
succeed; in making
C.
stick; making
D.
lead; to make
【单选题】The chairman has not taken a ___ on the issue.
A.
attitude
B.
step
C.
action
D.
stand
【单选题】Which of the following has NOT been a title of Hillman F. Teasdaie?
A.
Chairman of Agave and CEO of Ventrus
B.
Vice Chairman of SigmaAgave
C.
Vice Chairman of SigmaAgave and interim Chairman of Genertec
D.
Interim Chairman of Genertec and former CEO of Agave
【单选题】The meeting started at ten o’clock, but the chairman has not _________ yet.
A.
turned up
B.
turned down
C.
turned out
D.
turned off
【单选题】设一个关系 A 具有 a1个属性和 a2 个元组，关系 B 具有 b1个属性和 b2 个元组，则关系 AXB 具有( )个元组。
A.
a1 + b1
B.
a2 X b2
C.
a1+b2
D.
a2Xb1
【单选题】下列进路中（）不属于敌对进路。
A.
同一到发线上对向的列车进路
B.
同一到发线上对向的调车进路
C.
同一到发线上对向的列车进路和调车进路
D.
同一咽喉区顺向重叠的调车进路
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