This paper studies,by means of analysis,comparison and induction,the systematic differentials caused by the mal-position of reflective plane mirror and vertical ruler in light-lever magnifying system.

This article, with creative thinking, in the perspective of"Bu Fan Zheng Wei", discusses the nature of poetry based on the book of"Shi Ren Yu Xie".

The principle of equitable subordination is that when a corporation is hit by in going bankrupt、liquidation、reorganization,the corporation will discharge the loan with unjust behaviours after the other loans,to ensure all creditors can distribute equitably.