(2012)某种多孔材料密度为2.4g/cm3,表观密度为1.8g/cm3。该多孔材料的孔隙率为:() ["20%","25%","30%","35%"]
用于治疗肾炎的药物是() ["A.葛根","B.麻黄","C.柴胡","D.细辛","E.桂枝"]
不具有抗炎作用的解表药是() ["A.葛根","B.麻黄","C.柴胡","D.细辛","E.桂枝"]
与麻黄"利水消肿"功效密切相关的药理作用是() ["兴奋中枢","抗炎","镇咳","解热","利尿"]
出版物内容差错的主要成因,一般不包括()。 ["原稿本身的差错","录排过程中的差错","校对遗留的差错","胶片制版的差错"]
如何理解教育技术中的“技术”含义?