对全肺切除术后所置的胸腔引流管一般呈钳闭状态，以保证术后患侧胸腔内有一定的渗液，以减轻或纠正明显的纵隔移位。（）
参考答案：对
So the man left France, ______ to give up the fortune that would one day come to him,
______ to live in England.
A．to prefer; went
B．preferring; had gone
C．preferred; going
D．preferring; and went
下列哪项对肝血流没有直接影响()
A．儿茶酚胺
B．缺氧或CO蓄积
C．椎管内麻醉
D．吸入氟烷
E．吸入NO
