检查胸壁时，应着重检查下列哪些项目（）
A.胸壁静脉
B.皮下气肿
C.胸壁压痛
D.肋间隙
E.胸廓形态
参考答案：A, B, C
The settlement is home to nearly 1,000 people, _____ left their village homes for a better life in the city.
A．many of those
B．many of which
C．many of them
D．many of whom
CAD技术在工程设计中的应用有哪些？
