How many different types of grey number are there?
A、Greynumberswithonlyalowerbound.
B、Greynumberswithonlyanupperbound.
C、Intervalgreynumber.
D、Continuousanddiscretegreynumbers.
E、Blackandwhitenumbers.
F、Essentialandnon-essentialgreynumbers.
发布时间：2024-09-07 04:14:35
