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【单选题】
在满足实体元整性约束的条件下 ()
A.
一个关系中必须有多个候选关键字
B.
一个关系中只能有一个候选关键字
C.
一个关系中应该有个或多个候选 关键字
D.
一个关系中可以没有候选关键字
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参考答案：
举一反三
【单选题】___ from what he said, he seemed to have succeeded.
A.
To judge
B.
Judging
C.
Judged
D.
To have judgeed
查看完整题目与答案
【单选题】Instead, he seemed to see Tom ’s face, with the wide smile he ______ whenever he told a joke.
A.
wore
B.
brought
C.
appeared
D.
carried
查看完整题目与答案
【单选题】听力原文：I ran into Jill in the stationer's. He bought some plain blue paper. He seemed to be fond of the color of plain blue. (25)
A.
Jill bought some colored writing paper.
B.
The plane was stationary.
C.
Jill bought a plane ticket.
D.
The paper blew away.
查看完整题目与答案
【简答题】女性，65岁，近期反复出现右侧肢体无力并言语障碍，持续10min后症状消失。 最可能的诊断是A．脑梗塞 B．蛛网膜下腔出 C．短暂脑缺血发作 D．高血压脑病 E．脑出血 患者既往高血压病史，现血压控制不佳，有吸烟史，下一步指导诊治错误的是A．使用抗血小板药物 B．注意休息、避免劳累及情绪波动 C．戒烟 D．行头颅影像学检查，明确有无脑缺血改变 E．待患者症状持续发作时再行诊治 如患者因上述症状持续...
查看完整题目与答案
【简答题】Mr. and Mrs. Green were very worried about their son, Leo. He seemed to be dumb( 哑的） he was normal（正常） in every other way. Mr. and Mrs. Green tried to get him to ,but with no success. When Leo was six...
查看完整题目与答案
【单选题】Why are the threats to fish more alarming than the threats to animals and birds?
A.
Because fish is a much needed food resource.
B.
Because plenty of fish is killed every year.
C.
Because fish is the only diet for many people.
D.
Because the sea fisheries are going to be exhausted.
查看完整题目与答案
【单选题】☆11.下列面粉中面筋质含量最高的是( )。
A.
饼干粉
B.
蛋糕粉
C.
面包粉
D.
通用粉
查看完整题目与答案
【多选题】Why are the expressions of animals and their meat in English different?
A.
because it was the Saxon peasants who reared the animals
B.
because the Saxon churls cannot afford the meat
C.
because the ruling class did not allow the Saxon peasant to eat the meat
D.
because only the ruling class can afford the meat
查看完整题目与答案
【判断题】项目投资以收付实现制为基础计算出现金流入,现金流出和净现金流量,并以净现金流量作为决策的依据。
A.
正确
B.
错误
查看完整题目与答案
【单选题】What was Philips reaction to his class?
A.
He seemed to have enjoyed it.
B.
He found his class surprising.
C.
He thought class was too short.
D.
He wanted to change class.
查看完整题目与答案
相关题目：
【单选题】___ from what he said, he seemed to have succeeded.
A.
To judge
B.
Judging
C.
Judged
D.
To have judgeed
查看完整题目与答案
【单选题】Instead, he seemed to see Tom ’s face, with the wide smile he ______ whenever he told a joke.
A.
wore
B.
brought
C.
appeared
D.
carried
查看完整题目与答案
【单选题】听力原文：I ran into Jill in the stationer's. He bought some plain blue paper. He seemed to be fond of the color of plain blue. (25)
A.
Jill bought some colored writing paper.
B.
The plane was stationary.
C.
Jill bought a plane ticket.
D.
The paper blew away.
查看完整题目与答案
【简答题】女性，65岁，近期反复出现右侧肢体无力并言语障碍，持续10min后症状消失。 最可能的诊断是A．脑梗塞 B．蛛网膜下腔出 C．短暂脑缺血发作 D．高血压脑病 E．脑出血 患者既往高血压病史，现血压控制不佳，有吸烟史，下一步指导诊治错误的是A．使用抗血小板药物 B．注意休息、避免劳累及情绪波动 C．戒烟 D．行头颅影像学检查，明确有无脑缺血改变 E．待患者症状持续发作时再行诊治 如患者因上述症状持续...
查看完整题目与答案
【简答题】Mr. and Mrs. Green were very worried about their son, Leo. He seemed to be dumb( 哑的） he was normal（正常） in every other way. Mr. and Mrs. Green tried to get him to ,but with no success. When Leo was six...
查看完整题目与答案
【单选题】Why are the threats to fish more alarming than the threats to animals and birds?
A.
Because fish is a much needed food resource.
B.
Because plenty of fish is killed every year.
C.
Because fish is the only diet for many people.
D.
Because the sea fisheries are going to be exhausted.
查看完整题目与答案
【单选题】☆11.下列面粉中面筋质含量最高的是( )。
A.
饼干粉
B.
蛋糕粉
C.
面包粉
D.
通用粉
查看完整题目与答案
【多选题】Why are the expressions of animals and their meat in English different?
A.
because it was the Saxon peasants who reared the animals
B.
because the Saxon churls cannot afford the meat
C.
because the ruling class did not allow the Saxon peasant to eat the meat
D.
because only the ruling class can afford the meat
查看完整题目与答案
【判断题】项目投资以收付实现制为基础计算出现金流入,现金流出和净现金流量,并以净现金流量作为决策的依据。
A.
正确
B.
错误
查看完整题目与答案
【单选题】What was Philips reaction to his class?
A.
He seemed to have enjoyed it.
B.
He found his class surprising.
C.
He thought class was too short.
D.
He wanted to change class.
查看完整题目与答案
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