本质晶粒度
芳烃抽提过程中溶剂回收部分的主要设备有?() ["水洗塔","水分馏塔","水洗塔和水分馏塔","水洗塔,水分馏塔和汽提塔"]
样本≥40的病例对照研究,对假设进行显著性检验采用的统计学方法是() ["χ2<\/sup>检验","t检验","方差分析","F检验","r相关分析"]
MDS的本质是() ["原因不明的贫血","先天性造血功能紊乱","获得性造血干细胞克隆性疾病","白血病前期","淋巴细胞亚群分布异常"]
溃疡初起,脓栓未落,腐肉未脱,可选用()。 ["消散药","止血药","腐蚀药与平胬药","生肌收口药","提脓祛腐药"]
粘度