问题
单项选择题
（）are designed to manage large bodies of information．
A．I/O ports
B．Printers
C．Database system
D．Keyboards
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
（）are designed to manage large bodies of information．
A．I/O ports
B．Printers
C．Database system
D．Keyboards
参考答案：C
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