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In the RGB color spaces, each pixel on the screen has a corresponding RGB value which consists of(71)components.
A．two
B．three
C．four
D．six
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更多 “ In the RGB color spaces, each pixel on the screen has a corresponding RGB value which consists of(71)components.A．twoB．threeC．fourD．six ” 相关考题
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多选题Which two statements are true about a bitmap index？ （）AIt is recommended for the columns that have unique values.BIt can be converted to a B-tree index by using the ALTER INDEX command.CIt has a bitmap segment for each distinct value in the key column， containing a string of bits in which each bit represents the presence or absence of a key column value.DUpdating the key column locks the whole bitmap segment that contains the bit for the key value to be updated.
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单选题What type of constraint is used to ensure that each row inserted into the EMPLOYEE table with a value in the WORKDEPT column has a row with a corresponding value in the DEPTNO column of the DEPARTMENT table?（）A
A check constraint on the EMPLOYEE tableB
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A foreign key reference from the EMPLOYEE tables WORKDEPT column to the DEPTNO column of the DEPARTMENT table
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