脊柱的功能是支持躯干和保护脊髓。
参考答案：对
下列哪些辅料可用于做薄膜衣材料
A．HPC
B．PVP
C．AEA
D．PEG
E．MC
Amy was reading a book I came in.[ ]
A. when
B. while
C. because
D. though
