A client is being admitted to the labor unit. Because she's well advanced in labor, the nurse must prioritize the admission questions. Which information is most important to obtain when birth is imminent

A．Duration of previous labor.

B．Frequency of contractions.

C．Presence of bloody show.

D．Expected due date.

消化道溃疡发病的主要攻击因素是()

A．大肠杆菌

B．幽门螺杆菌

C．白色念珠菌

D．肠球菌

E．厌氧菌