骨骺及干骺端结核的特征表现不包括()
A.为跨越骨骺与干骺端的骨质破坏
B.病灶向关节方面穿破
C.体积小而密度淡的死骨
D.周围组织的骨质疏松
E.病灶经常向骨干蔓延
参考答案:B
In China students _______ greet the teachers when classes begin. [ ]
A. are supposed to
B. are suppose to
C. suppose to
D. are supposing to
管式桅杆竖立时,其与地面的夹角不得小于().