位置的边缘效应
参考答案:
指PCR基因扩增仪最外周的样品孔温度与中间的样品孔差异,不均一,从而导致外周样品孔的PCR扩增效率不佳,该效应称为“位置的边缘效应”。
在JIT环境下,为了减少交易的次数,企业会采用哪种做法或系统()
A.阻止交易
B.预先减少
C.回冲系统
D.条形码系统
When assessing a client as a candidate for crutch walking, the nurse should take into account that for some elderly people, crutch walking is an impractical goal primarily because which of the following reason()
A. Decreased reaction time.
B. Decreased visual acuity.
C. Decreased motor coordination.
D. Decreased level of comprehension.