排水孔后应铺设（），以防孔后土坡发生渗透变形。
A.反滤材料
B.黏土
C.混凝土
D.水泥砂浆
参考答案：A
A primigravida at 34 weeks’ gestation is diagnosed with hydramnios. After delivery of the neonate, a priority for the nurse is to assess the neonate for which problem
A. Kidney disorders.B. Cardiac defects.C. Diabetes mellitus.D. Esophageal atresi
胰岛细胞瘤的CT特点为（）
A.增强扫描动脉期明显结节样强化病灶
B.延迟扫描明显结节样强化病灶
C.延迟扫描明显环样强化灶
D.增强扫描静脉期低密度结节灶
E.增强扫描动脉期低密度结节灶
