46某孕妇为Rh-,第一胎分娩Rh+胎儿,为防止再次妊娠的Rh+胎儿产生溶血症,应给Rh-母亲注射 ( )
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
免费的网站请分享给朋友吧