结核球的形成是干酪样坏死物被
A．机化
B．钙化
C．包裹
D．排出
参考答案：C
______ the book ______ her arm, Miss Gao came into the classroom ______ usual. [ ]
A. With, under, like
B. With, under, as
C. Carrying, in, with
D. Has, in, as
《水中钍的分析方法》（GB／T1122仁l989）中需要测量的射线是（）
A.中子
B.a
C.13l
D.都不需要
