单项选择题

Data is the plural form of（）, it is rarely used.

A．number
B．datum
C．letter
D．date

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单项选择题

According to the information in the passage, the term general purpose computer, in literal translation（）

A．implies that many different types of computers
B．implies that many different types of divisions
C．implies that many different types of problems can be handled by the machine
D．implies that many different operators

单项选择题

High-capacity computers used primarily for research purposes are（）.

A．supercomputers
B．applications
C．divisions
D．systems