The analysis was made on the influence factors of the primary and middle schools P. E. core teachers' training with the methods of literature study, investigation and mathematical statistics.
运用文献资料法、问卷调查法和统计法对河南省中小学体育骨干教师的成才因素进行研究。
There are a lot of types security of products on the market now, if the safe products have back doors or add the password, it has a bad influence on the E-government when using.
现在市场上有很多类型的安全产品,如果安全产品本身有后门或加了密码,对电子政务应用就会产生不良影响。
This paper reviews the influence of air contaminants, i. e., impurities in air stream of cathode, on the performance of proton exchange membrane of fuel cells (PEMFC).
论述了城市空气污染物(即阴极气体杂质)对质子交换膜燃料电池(PEMFC)性能的影响。
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