Which of the following descriptions of gray numbers is correct?
选项:
A:A grey number is a kind of uncertain number which exact value and the range are unknown.
B:A grey number is a kind of uncertain number which exact value is unknown but the range of the number is known.
C:The value range of the gray number can only be an interval.
D:Black and white numbers are not gray numbers.
发布时间:2024-05-06 16:04:04