骨基质发生的良性肿瘤为（）
A.骨肉瘤
B.骨旁骨瘤
C.骨样骨瘤
D.成骨细胞瘤
E.髓性骨肉瘤
参考答案：B, C, D
George couldn’t remember when he first met Mr. Anderson, but he was sure it was _______ Sunday because everybody was at _________ church.
A．a; /
B．the; /
C．/; the
D．/; a
正常人GCS评分为（）
A.1l
B.10
C.14
D.15
