X线平片不能显示骨骼系统的哪种组织
A．骨膜
B．骨皮质
C．骨松质
D．骨髓腔
E．营养血管
参考答案：A
Will you _______ us in a walk and did you _______ the school sports meeting yesterday? [ ]
A. take part in, join
B. join, take part in
C. have, join
D. join in, take part in
组合雕刻的特点是：选料不受品种限制，色彩多种多样，雕刻方便，成品富有真实感。
