【单选题】The new plan is ( ) and everybody present agrees with it.
【单选题】( )也称分类抽样,是指先将总体按某些特征分成若干个层,再从各层中分别随机抽取一定的单元构成样本。
【单选题】The purpose of the new plan is to make life easier, ______ it more difficult.
【简答题】加固体辅料炒时,需将辅料先炒至灵活状态,再投药的方法有___、___、___ 、___ 。
【单选题】The new plan is _____ and everybody present agrees with it.