【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：
复制
纠错
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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（）。
①
A.SNAP是否为开启状态
②
B.VIEWRES是否为PastZoom状态
③
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A system of categories based on the communicative needs of the learner
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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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remainded
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【单选题】
4. David watched her car until it ____ from view.
①
remained
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delayed
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grew
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disappeared
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