单项选择题

Which UNIX command creates a symbolic link named myfile in the current directory to the file/etc/hosts

A．In -s/etc/hosts myfile
B．In -s myfile/etc/hosts
C．link -s/etc/hosts myfile
D．link -s myfile/etc/hosts
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单项选择题
There are a kind of persons who use computer to deal with data and produce some information，but they do not change the hardware system and the software system．Which kind of person are they
A．system architect
B．language creator
C．terminal user
D．computer scientist
单项选择题
实施软件开发的原型化方法应具备某些必要的条件，下述中是其必备条件的是 Ⅰ．原型系统的积累 Ⅱ．原型化开发人员 Ⅲ．需求的准确理解 Ⅳ．完善的开发工具
A．Ⅰ和Ⅳ
B．Ⅱ和Ⅲ
C．Ⅲ和Ⅳ
D．Ⅱ和Ⅳ
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