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【单选题】
在一个密闭容器内有甲、乙、丙、物质，在一定条件下充分反应，测得反应前后各物质的质量如下： 下列有关该反应的说法不正确的是 [     ]
A.
生成物
B.
待测x=4
C.
该反应可能是分解反应
D.
该反应可能是复分解反应
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B.
晚12时
C.
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D.
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Implement the INotifyPropertyChanged interface in the Product class.
B.
Implement the INotifyCollectionChanged interface in the ProductList class.
C.
Set the Mode property of the Binding object of the ListBox control to TwoWay.
D.
Set the UpdateSourceTrigger property of the Binding object of the ListBox control to PropertyChanged.
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【单选题】_________ is a type of activity in which the teacher reads out a passage in normal speed for two or three times and students are to note down the words they could catch as they listen as much as possi...
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Gap-filling.
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【单选题】Which of the following is false about indexes?
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Index files are auxiliary files used to speed up searching of a data file
B.
Spatial indexes represent extended spatial data by minimum orthogonal bounding rectangles
C.
B-tree is a popular method for indexing spatial data
D.
A space-filling curve improves performance of B-tree on spatial data
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