影响牙槽嵴吸收速率的局部因素是
A．失牙原因B．失牙时间C．局部骨质密度D．是否经过牙槽嵴修整E．以上都是
参考答案：E
There were many giant octopus, ____? [ ]
A. were there
B. were it
C. weren't there
D. weren't it
脑血栓形成在急性期的治疗方法可选用（）
A.早期溶栓治疗
B.静滴PAMBA
C.静滴低分子右旋糖酐
D.静滴甘露醇
E.口服去痛片
