非化学计量空位形成的类型包括（）
A.非金属离子空位型
B.杂质离子空位型
C.原子空位型
D.金属离子空位型
参考答案：D
下列哪一组症状不是精浊的临床表现（）
A. * * 口溢脓液
B.尿频、尿急、尿痛
C.会阴、腰骶部疼痛
D.发病急骤、寒战高热
E.便后或尿后溢出白色分泌物
— It's said a pianist will perform at Poly Theater on Friday evening. Is it Lang Lang?
— Yes, it _______ him. He _______ for a week.
A．must be; has arrived here
B．Can’t; has been here
C．must be; has been here
D．maybe; has arrived here
