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【多选题】
按快门时反光板如何反应A.
反光板放下，保护感光器件．
B.
反光板抬起，感光器件记录景物．
C.
反光板放下，反射光线使得景象进入取景器．
D.
反光板抬起，取景器看不到景物．
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举一反三
【单选题】A graph, or a ____ as it is known in Microsoft Excel, is a visual representation of worksheet data.
A.
chart
B.
table
C.
diagram
D.
map
【单选题】( ) is not the operation of Excel.
A.
Paste
B.
Format Painter
C.
Customizing Toolbar
D.
Undo
【简答题】Excel is a ___________ program.
【单选题】What is a possible pitfall of utilizing Excel as a way to manipulate small databases?
A.
Excel does not enforce many principles of relational data models.
B.
Excel is a user program and thus cannot run on a server.
C.
Excel does not allow algorithms for data manipulation.
【单选题】Microsoft Excel is an example of:
A.
data management software
B.
presentation graphics.
C.
spreadsheet software.
D.
word processing software.
【单选题】（72） is a file that contains metadata—that is,data about dat
A.
document
B.
Excel table
C.
database
D.
data dictionary
【单选题】●A (72) is a file that contains metadata—that is，data about data. (72)
A.
document
B.
Excel table C. database D．data dictionary
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