A new method for separating and purifying p - AAB ( p - aminoazobenzene ) by dry - column chromatography is developed.提出了一种干柱层析法 分离提纯 试剂对氨基偶氮苯的新方法.The present invention provides membrane separating and purifying process ...
传教士向一千多人的会众讲演.The preacher addressed a congregation of more than one thousand people.最近发生的两起事件引发了更多人的关注。Two incidents in recent days have raised the level of concern.大多数文章谈不上适合更多人的胃口.Most articles are certainly not palat...