An agreement seems to be impossible because the majority of the committee members are ______________ it.

A．against

B．for

C．to

D．with

慢性龈炎

A．牙龈增生覆盖牙冠一般不超过1/3，很少波及附着龈
B．牙龈增生覆盖牙冠的1/3左右，一般不超过2/3，严重者可波及附着龈
C．牙龈增生常覆盖牙冠的2/3以上，很少波及附着龈
D．牙龈增生覆盖牙冠的2/3以上，常波及附着龈
E．牙龈形态基本正常
下列疾病牙龈增生的情况为