痴呆可治性病因有哪些
A．正常压力脑积水
B．神经梅毒
C．甲状腺功能低下
D．颅内占位性病变
E．维生素B12缺乏
参考答案：A,B,C,D,E
It worried her a bit _____ her hair was turning grey. [ ]
A. while
B. that
C. if
D. for
复式交分道岔挤岔后怎么办？
