【多选题】下列叙述与维生素E的性质不相符的是
E.
侧链上有4个双键,其中全反式异构体的活性最强
【单选题】具有选择性抗凝血因子ⅩA活性的药物是()
【判断题】检测发动机凸轮轴时,必须测量凸轮的圆度和圆柱度
【判断题】检测发动机凸轮轴时,必须测量凸轮的圆度和圆柱度。( )
【单选题】“digital divide”in the 4th paragraph refers to ____.
A.
the gap in terms of computer ownership
B.
the tendency of computer ownership
C.
the dividing line based on digits
D.
the ethnic distinction among American households
【单选题】A negative output gap is associated with a(n) _____ unemployment rate.