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听力原文: Advertising expenditure worldwide was $225 billion last year, according to a report of a leading magazine. $32 billion of this, or 14%, was taken by magazines. In Europe, the share of consumer magazine advertising expenditure was $12 billion, or 21% of an estimated overall spend of $57 billion. But the share has dropped in the past 15 years from 30 per cent, with decline having been particularly severe in Belgium and Germany where commercial television was introduced relatively late. (88)
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【单选题】egrep SUM AVERAGE datafile.txt命令执行后, 若下列哪些行在datafile.txt内,会被匹配
A.
SUM AVERAGE is function in Excel
B.
for Excel fuctions: SUM AVERAGE the value
C.
SDGAHFSUM AVERAGESDGASHNBF
D.
不会匹配上面任何行
【简答题】用egrep实现在datafile中匹配以n开头的行。(输入命令并上传运行结果截图)
【多选题】egrep "S(h|u)" datafile.txt命令执行后, 若下列哪些行在datafile.txt内,会被匹配
A.
Should
B.
hurry
C.
ubuntu
D.
Shutdown
【简答题】VB6.0的内部函数按照功能划分为:______、______、日期函数、转换函数及其他函数等。
【判断题】命令egrep与grep -E是等价的。
A.
正确
B.
错误
【单选题】批处理系统的主要特点之一是( )。
A.
非交互性
B.
实时性
C.
高可靠性
D.
分时性
【简答题】解释egrep '[^0-9]' datafile的作用。(输入命令并上传运行结果截图)
【单选题】当 三极管具有开关作用时,通过控制 ( )极的电压控制开关的断开或闭合。
A.
发射
B.
C.
集电
D.
其他选项都不正确
【简答题】解释egrep '^[we]' datafile 的作用,并用另一种正则方法实现相同的匹配效果。(输入命令并上传运行结果截图)
【多选题】egrep "Sh|u" datafile.txt命令执行后, 若下列哪些行在datafile.txt内,会被匹配
A.
Should
B.
hurry
C.
ubuntu
D.
Shutdown
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