petra是什么意思

用法例句

Research on the positive and negative effect of market economy and recognition misunderstanding;

市场经济的正负效应与认识误区的研究

This paper analyzes the positive and negative effect of in- terest tax,reveals that C.

通过分析利息税的正负效应,深刘揭示了我国利息税产生负效应的因素,特别强调了利息税正在放大马太效应,慎重提出了取消利息税的建议。

This article analyzes the positive and negative effect of information age on personal quality from different viewpoint.

本文多角度地分析了信息化对人格素质的正负效应 ,对于人们理性分析信息化对人格素质的影响将会有所启

These skills were used to account ratios of positive and negative merit and power of the colligate .

结果:训练后的患者所做的正负功比值和正负功率比值接近正常人状况的人数增多,原来不能完成第三和第四区测试的人,经过训练后能完成整个区域的测试。