一般认为与牙周炎有关的重要致病菌有
A．牙龈卟啉菌
B．伴放线杆菌
C．中间普氏菌
D．核梭形杆菌
E．革兰阳性菌
参考答案：A,B,C,D
表示每个红细胞内平均所含血红蛋白量的是（）
A.HCT
B.MCV
C.MCH
D.MCHC
E.RDW
At the evening party the host said ______ was able to solve the riddle could get a nice present as a reward.
A．whoever
B．who
C．no matter who
D．whomever
