单项选择题
Data is the plural form of（）, it is rarely used.
A．number B．datum C．letter D．date
单项选择题 According to the information in the passage, the term general purpose computer, in literal translation（）
单项选择题 High-capacity computers used primarily for research purposes are（）.
单项选择题 According to the passage, many people can use（）at the same time.
