This paper gives the definition of P-hereditary ring and discusses the necessary and sufficient condition about the submodule closure of cyclic module.
本文给出p—遗传环的定义及循环模的子模闭的充要条件。
2
There was significant difference between the eyes with closure reflexes and the eyes without closure reflexes (P<0.01).
在有、无闭眼反射下，眼压测定值在统计学上差异有显著性（P<0.01）。
3
There was no difference in the incidence of pulmonary complication and mechanical support time in patient with delayed sternal closure and non-delayed sternal closure (P>0.05).