脊髓灰质炎的隐性感染率为() ["50%","90%","60%","80%","70%"]
支气管哮喘者禁用() ["阿司匹林","布洛芬","吡罗昔康","舒林酸","尼美舒利"]
遗传性疾病是由于() ["先天性因素引起的疾病","家族性发生的疾病","遗传物质改变导致的疾病","上代亲属有同样的疾病","以上都是"]
正常胎儿血液循环中血氧含量最高的部位是() ["主动脉","肺动脉","左心房","脐静脉","脐动脉"]
注意缺陷多动障碍的主要特征不包括() ["注意缺陷","活动过多","行为冲动","学习困难","智力正常"]
气化炉烧嘴盘管破裂后,()可能将进入冷却水排出管线。