维生素D缺乏病骨质软化引起的变形有（）
A.方形头
B.眼距增宽
C.鸡胸
D."O"形腿
E.串珠肋
参考答案：A, B, C, D, E
（-45）+（+23）=______．
．It only take her three days before she found herself to be _______with her new co-workers
A．at a harmony
B．at harmony
C．in a harmony
D．in harmony
