--- Have you gone over what the teacher taught in class?        

--- Not yet.

--- Better remember: ________.

A．Don’t count your chickens before they’re hatched

B．A bird in hand is worth two in the bush

C．Strike while the iron is hot

D．All roads lead to Rome

要完全避免散列所产生的“堆积’’现象，通常采用_____解决冲突。