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【单选题】
统计档案表中学生来自多少个城市，下面SQL语句正确的是（ ）。A.
SELCET SUM(DISTINCT 家庭住址) FROM 档案表;
B.
SELCET DISTINCT 家庭住址 FROM 档案表;
C.
SELCET COUNT(家庭住址) FROM 档案表;
D.
SELCET COUNT(DISTINCT 家庭住址) FROM 档案表;
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举一反三
【多选题】Which three statements are true about the application of QoS models？ （）
A.
The DiffServ model requires applications to signal the network with QoS requirements.
B.
The DiffServ model can be used to deliver QoS based upon IP precedence， or source and destination addresses.
C.
The DiffServ model requires RSVP.
D.
The best effort model is suitable for applications such as file transfer and e-mail
E.
The IntServ model requires applications to signal the network with QoS requirements.
F.
The IntServ model attempts to deliver a level of service based on the QoS specified by each packet
【判断题】Letter of authorization (授权证书) of mail transfer can be circulated and transferred by endorsement.
A.
正确
B.
错误
【简答题】法国画家保罗、高更的一系列不朽作品都完成于?
【判断题】What Paul talks is boastful and nonsensical in a fashion. 保罗的谈话有几分胡吹瞎扯。()
A.
正确
B.
错误
【多选题】保罗·高更的艺术成就有哪些?
A.
他主张绘画的抽象性，亦即综合概括的特性
B.
一直在思考形、色和线的抽象意义
C.
他反对从感觉出发模仿自然，提倡从精神出发去利用大自然
D.
试图借助对自然观察诱发的想象来获取抽象性
【多选题】Which three statements are true about the appliance of QoS models？（）
A.
the DiffServ model requires applications to signal the network with QoS requirements
B.
the DiffServ model can be used to deliver QoS based upon IP precedence， or source and destination addresses
C.
the DiffServ model requires RSVP
D.
the best effort model is suitable for applications such as file transfer and e-mail
E.
the IntServ model requires applications to signal the network with QoS requirements
F.
the IntServ model model attempts to deliver a level of service based on the QoS specified by each packet
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