单选题
The units used for computing data from a number of different sources without a preponderance of functions in any one system.
A
The units which function as data computing portions. The data sources are different and not limited within system functions.
B
The units which are used to compute data which come from several diverse sources. And the data should not be collected mainly from any one system.
C
The units which are used to collect data from a few different sources and compute the data to respond to different functions in any one system.
答案解析
正确答案:B
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