媒体炉
下列关于三七止血作用机制的叙述,不正确的是() ["增加血小板数量","增强血小板功能","收缩出血局部血管","抑制纤溶酶活性","增加血液中凝血酶含量"]
某土样的压缩系数a1-2=0.5MPa-1,在100kPa压力作用下压缩24小时后,土样的孔隙比e=0.96,则在200kPa压力作用下压缩24小时后,该土样的孔隙比为()。 ["0.88","1.02","0.43","0.91"]
某矩形基础中心点下1m处竖向附加应力为90kPa,则该基础角点下1m处的竖向附加应力为()。 ["112.6kPa","103.2kPa","92.8kPa","64.6kPa"]
三七抗血栓的成分是() ["三七黄酮B","三七黄酮A","人参皂苷Rb1","人参三醇苷Rg1","人参炔三醇"]
为什么说资本积累是一条客观规律?