脑电图最常用于哪种脑部疾病的诊断（）
A.脑部肿瘤
B.脑出血
C.脑炎
D.脑脓肿
E.癫痫
参考答案：E
The Science Museum, ____________ we visited during a recent trip to Britain, is one of London’s tourist attractions.
A．which
B．what
C．that
D．where
牙周膜的主要成分是
A．胶原纤维B．上皮剩余C．成骨细胞D．破骨细胞E．成牙骨质细胞
