—How _____ glasses of water do you drink every day?  

—Three.[ ]

A. \            

B. many          

C. much        

D. little

哪项体征最支持溃疡穿孔的诊断

A．腹肌紧张

B．腹叩诊呈鼓音

C．肝浊音界消失

D．腹部移动性浊音