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【简答题】
某工厂生产若干产品,每种产品由不同的零件组成,每个零件用在不同的产品上。这些零件由不同的原材料制成。不同的零件所用的材料可以相同。这些零件按所属的不同产品分别放在仓库中,原材料按类型放在若干仓库中。 产品属性有:编号、名称 零件属性有:编号、名称 材料属性有:编号、名称、材料类型 仓库属性有:编号、名称、地点 1请用E-R图画出工厂产品、零件、材料、仓库的概念模型,并注明属性和联系类型。(5分) 2将E-R图转换成关系模型 ,并注明主码和外码。(5分)
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参考答案：
举一反三
【简答题】如图 （1）指针从“1”绕点O顺时针旋转60°后指向______ （2）指针从“1”绕点O逆时针旋转90°后指向______ （3）指针从“7”绕点O逆时针旋转90°后指向______ （4）指针从5绕点O旋转到12点，顺时针要旋转______度，逆时针要旋转______度．
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【单选题】听力原文： 'There is a senseless idea that children grow up and leave home when they're 18, and the truth is far from that, 'says sociologist Larry Bumpass of the University of Wisconsin. Today, unexpected...
A.
Young adults should leave their parents and live independently.
B.
Middle class young adults should stay longer with their parents.
C.
Divorced young adults should move back home.
D.
Young adults should attend nearby colleges in order to live with their parents.
查看完整题目与答案
【单选题】'There is a senseless notion that children grow up and leave home when they're 18, and the truth is far from that,' says sociologist Larry Bumpass of the University of Wisconsin. Today, unexpected num...
A.
there will inevitably be inconveniences in everyday life
B.
most parents find it difficult to keep a bigger family going
C.
young adults tend to be overprotected by their parents
D.
public opinion is against young adults staying with their parents
查看完整题目与答案
【判断题】强、不平衡、灵活的神经活动类型所对应的气质类型抑郁质。()
A.
正确
B.
错误
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【单选题】如果在表示树的孩子一兄弟链表中有6个空的左指针域，7个空的右指针域，5个结点左、右指针域都为空，则该树中叶子的个数( )。
A.
有7个
B.
有6个
C.
有5个
D.
不能确定
查看完整题目与答案
【单选题】'There is a senseless notion that children grow up and leave home when they're 18, and the truth is far from that,' says sociologist Larry Bumpass of the University of Wisconsin. Today, unexpected num...
A.
for young adults to leave their parents and live independently.
B.
for middle class young adults to stay with their parents:
C.
for married young adults to move back home after a lengthy absence.
D.
for young adults to get jobs nearby in order to live with their parents.
查看完整题目与答案
【单选题】强、平衡、不灵活这种神经活动类型所对应的气质类型是
A.
胆汁质
B.
多血质
C.
粘液质
D.
抑郁质
查看完整题目与答案
【单选题】There is a senseless notion that children grow up and leave home when they're 18, and the truth is far from flint, says sociologist Larry Bumpass of the University of Wisconsin. Today, unexpected numb...
A.
fur young adults to leave their parents and live independently
B.
for middle class young adults to stay with their parents
C.
for married young adults to move back home after a lengthy absence
D.
for young adults to get jobs nearby in order to live with their parents
查看完整题目与答案
【单选题】强、平衡、不灵活这种神经活动类型所对应的气质类型是
A.
胆汁质
B.
多血质
C.
粘液质
D.
抑郁质
E.
以上都不是
查看完整题目与答案
【简答题】实验7 指针
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相关题目：
【简答题】如图 （1）指针从“1”绕点O顺时针旋转60°后指向______ （2）指针从“1”绕点O逆时针旋转90°后指向______ （3）指针从“7”绕点O逆时针旋转90°后指向______ （4）指针从5绕点O旋转到12点，顺时针要旋转______度，逆时针要旋转______度．
查看完整题目与答案
【单选题】听力原文： 'There is a senseless idea that children grow up and leave home when they're 18, and the truth is far from that, 'says sociologist Larry Bumpass of the University of Wisconsin. Today, unexpected...
A.
Young adults should leave their parents and live independently.
B.
Middle class young adults should stay longer with their parents.
C.
Divorced young adults should move back home.
D.
Young adults should attend nearby colleges in order to live with their parents.
查看完整题目与答案
【单选题】'There is a senseless notion that children grow up and leave home when they're 18, and the truth is far from that,' says sociologist Larry Bumpass of the University of Wisconsin. Today, unexpected num...
A.
there will inevitably be inconveniences in everyday life
B.
most parents find it difficult to keep a bigger family going
C.
young adults tend to be overprotected by their parents
D.
public opinion is against young adults staying with their parents
查看完整题目与答案
【判断题】强、不平衡、灵活的神经活动类型所对应的气质类型抑郁质。()
A.
正确
B.
错误
查看完整题目与答案
【单选题】如果在表示树的孩子一兄弟链表中有6个空的左指针域，7个空的右指针域，5个结点左、右指针域都为空，则该树中叶子的个数( )。
A.
有7个
B.
有6个
C.
有5个
D.
不能确定
查看完整题目与答案
【单选题】'There is a senseless notion that children grow up and leave home when they're 18, and the truth is far from that,' says sociologist Larry Bumpass of the University of Wisconsin. Today, unexpected num...
A.
for young adults to leave their parents and live independently.
B.
for middle class young adults to stay with their parents:
C.
for married young adults to move back home after a lengthy absence.
D.
for young adults to get jobs nearby in order to live with their parents.
查看完整题目与答案
【单选题】强、平衡、不灵活这种神经活动类型所对应的气质类型是
A.
胆汁质
B.
多血质
C.
粘液质
D.
抑郁质
查看完整题目与答案
【单选题】There is a senseless notion that children grow up and leave home when they're 18, and the truth is far from flint, says sociologist Larry Bumpass of the University of Wisconsin. Today, unexpected numb...
A.
fur young adults to leave their parents and live independently
B.
for middle class young adults to stay with their parents
C.
for married young adults to move back home after a lengthy absence
D.
for young adults to get jobs nearby in order to live with their parents
查看完整题目与答案
【单选题】强、平衡、不灵活这种神经活动类型所对应的气质类型是
A.
胆汁质
B.
多血质
C.
粘液质
D.
抑郁质
E.
以上都不是
查看完整题目与答案
【简答题】实验7 指针
查看完整题目与答案
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