【多选题】采购部门在制定采购计划后,需要进行( )决策
【多选题】人体触电方式有以下几种:高压电场对人体的伤害、静电对人体的伤害、()。
【判断题】检修电器时应将中性线看作是带电体。 ( )
【判断题】跨步电压触电、高压电场触电都属于直接接触触电。
【判断题】While students are doing the activity, the teacher should walk around the classroom and overhear what the students are saying.
【单选题】Which are the results of the increasing freedom the students are given?
A.
The studens become much more responsible.
B.
The students rarely attend any classes.
C.
The students have more weaknesses when they leave school.
D.
The students improve academically
【单选题】通常所说的血型是指红细胞膜上的特异抗原类型,其化学本质是