下列属于稳定骨折的是()。
A.嵌插骨折
B.斜行骨折
C.螺旋形骨折
D.粉碎骨折
E.开放性骨折
参考答案:A
When we hurried to the station, there happened ____ no bus at that time. [ ]
A. to have
B. to be
C. having
D. being
知识产权的特征不包括()
A.专有性
B.时间性
C.地域性
D.无形性
E.永久性