B型血的人除可输同型血外,还可接受的血型是[ ]
A.AB型
B.O型
C.A型
D.B型
答案:B
最有助于确诊阿尔茨海默病()
A.肌电图
B.肌肉活检
C.头MRI
D.脑电图
E.基因检测
I am as busy as a bee; you bother me with so many questions now?[ ]
A. May
B. Must
C. Can
D. Shall