开放性骨折指
A.骨折处皮肤黏膜完整,骨折端不与外界相通B.骨折处软组织破裂,骨折端与外界相通C.骨折部碎成3块以上D.发生于肌腱附着部位的骨折E.骨折有移位、畸形
参考答案:B
This is ___ __ boy. That girl is _______.
A.an 8-year-old;6 years old.
B.an 8-years-old;6 years old
C.an 8-year-old;6-year-old
D.a 8-year-old; 6-year-old
恶性肿瘤的自然生长史可分几个阶段?