Some people argue that both the government and the milk producers are ________ for the death of the babies.

A．blamed

B．blaming

C．to be blamed

D．to blame

钢材经冷拉、冷拔、冷轧等冷加工后，性能会发生显著改变。以下表现何者不正确（）.

A.强度提高 

B.塑性增大 

C.变硬 

D.变脆