胎儿血液含氧量最高的血管是（） ["主动脉","肺静脉","下腔静脉","脐静脉","脐动脉"]
胎儿血液含氧量最低的血管是（） ["主动脉","肺静脉","下腔静脉","脐静脉","脐动脉"]
不引起嗜酸性粒细胞增多的疾病是（） ["支气管哮喘","猩红热","伤寒","慢性粒细胞白血病","肠寄生虫"]
使血沉减慢的因素是（） ["血沉管倾斜","室温高于25℃","标本有血凝块","标本溶血","测定管的内径比标准管小"]
正常妊娠，整个孕期孕妇的体重约增加（） ["8.5kg","10.5kg","12.5kg","14.5kg","16.5kg"]
目前认为，MS的发病与（）、（）、有关。
