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【单选题】
在Excel中,以下选项引用函数正确的是 ( )。
A.
=(sum)A1:A5
B.
=sum A1:A5
C.
=sum(A2,B3,B7)
D.
=sum(A10,B5:B10:28)
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参考答案:
举一反三
【单选题】单片机输出信号为 电平。
A.
RS-232C
B.
TTL
C.
RS-449
D.
RS-232
【简答题】One night four college kids ____ 1 1____ (stay) out late, partying and having a good time. They paid no mind ___ 1 2___ the test they had scheduled for the next day and didn't study. In the morning, t...
【单选题】单片机输出信号为( )电平
A.
RS-232
B.
TTL
C.
RS-449
D.
RS-232C
【简答题】Tommy's mother felt surprised that his son__________
【单选题】单片机输出信号为( )电平。
A.
RS-232
B.
TTL
C.
RS-485
D.
RS-232C
【单选题】单片机输出信号为( )电平。
A.
RS-232C
B.
TTL
C.
RS-449
D.
RS-485
【单选题】单片机输出信号为?电平?
A.
RS-232C
B.
TTL
C.
RS-422
D.
RS-485
【单选题】They had no previous ______.
A.
convictions
B.
legislature
C.
assessment
D.
liabilities
【单选题】下面哪一条tar命令可以实现及打包又压缩home文件夹的功能?( )
A.
tar   –cvf    home.tar     /home
B.
tar  -tvf    home.tar
C.
tar   -xvf    home.tar
D.
tar  -cjvf    home.tbz    /home
【简答题】A.He felt his assignment was tougher than Sue's. B.His s complained about his service. C.He thought the boss was unfair to him. D.His boss was always finding fault with his work.
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