非空的循环单链表head的尾结点(由p所指向)，满足______。A．p-＞next

小儿出生时的平均头围是（）

A.34cm

B.44cm

C.46cm

D.48cm

E.50cm

转向架上轮对与构架之间的悬挂称为（），构架与车体之间的悬挂称为构架悬挂装置（又称二系悬挂）。

After a gastrectomy, the client will have a nasogastric tube in place for several days postoperatively. The nurse explains to the client that the nasogastric tube is for which of the following reasons

A．Prevent excessive pressure on suture lines.

B．Prevent the development of ascites.

C．Provide enteral feedings in the immediate postoperative period.

D．Enable administration of antacids to promote healing of the anastomosis.

男性，36岁，因下眶壁外爆性骨折经下睑睫毛下切口行修复术后1个月出现下睑轻度外翻，巩膜暴露2mm，受伤时皮肤软组织无裂伤，颧骨无骨折。应尽快采用哪种治疗措施()

A．继续观察

B．眼睑短缩术

C．外眦成形术

D．皮片移植术

E．颧骨截骨术

环境破坏