简述信息系统的目标及其具有的功能.
信息系统以支持或反映管理活动的内容为目标,完成特定信息的收集、处理、存储、分析和传递活动.具有将输入信息(数据、指令、文字等)转变成输出信息(报告、计算结果、消息等)的功能.
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The traditional method of food drying is to put it in places through which hot air is blown at temperature of about 110°C at entry to about 43°C at exit. This is the usual method for drying such things as vegetables, meat and