与胸内负压形成有关的因素为（）
A.非弹性阻力
B.弹性阻力
C.表面张力
D.肺的回缩力
E.肺的扩张力
参考答案：D
_______ that Marie was able to set up new branches elsewhere. [ ]
A. So successful her business was
B. So successful was her business
C. So her business was successful
D. So was her business successful
纠纷裁决委员会的委员特别应具有( )方面的丰富经验。
A．合同管理
B．法律程序
C．施工管理
D．工程施工
