After John wrote the abstract "采用水溶液聚合法合成了耐盐性丙烯酰胺型高吸水性树脂,在系统地考察单体配比、中和度、交联剂和引发剂用量对高吸水性树脂加压(约2kPa)吸液性能影响的基础上,运用正交实验对工艺条件进行优化,制备出加压下在去离子水和质量分数为0.9％的盐水中的吸水倍率分别为75和23.1的高吸水性树脂.", he wrote these keywords "丙烯酸铵, 丙烯酰胺, 耐盐性". Do you think his choice of keywords was correct? Answer yes or no.
yes