【单选题】【消耗次数：1】
在 SQL 语句中，视图定义的命令是
①
ALTER VIEW
②
SELECT VIEW
③
CREATE VIEW
④
MODIFY VIEW
参考答案：
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相关题目
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在AutoCAD中，VIEW视图管理命令有时无法作用，这种情况下，应检查（）。
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A.SNAP是否为开启状态
②
B.VIEWRES是否为PastZoom状态
③
C.ORTHO是否为OSNAP状态
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D.Regenauto变量是否设置为OFF状态
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A system of categories based on the communicative needs of the learner
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A communicative tool to build up and maintain social relations between people
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A linguistic system made up of various subsystems
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A a linguistic system and a means for doing things.
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What does the structural view of language see language?
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A system of categories based on the communicative needs of the learner
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A communicative tool to build up and maintain social relations between people
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A linguistic system made up of various subsystems
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A linguistic system and a means for doing things.
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What does the interactional view of language see language?
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A system of categories based on the communicative needs of the learner
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David watched her car until it ________ from view.
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remainded
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dalayed
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grew
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disappeared
【单选题】
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remained
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delayed
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grew
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disappeared
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正确
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错误
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线路停电时，必须按照（）顺序进行操作，送电时相反。
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断路器、负荷侧隔离开关、母线侧隔离开关
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断路器、母线侧隔离开关、负荷侧隔离开关
③
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电弧燃烧时，弧柱的电阻近似为零
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123、123、321
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123、321、321
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132、321、321