Based on the performance model of the act of the operation,the analytic hierarchy process to establish the performance model about the act of operation of many operating one machine was used, and then the model with a kind of antiaircraft artillery exercised.

At the same time, physics is also the basis of forming scientific world outlook and helps to develop good scientific attitudes and work style.

Comrade Jiang Zemin stressed that in order to attain the “Three Represents",the whole Party must strive to improve its ideological,study and work styles.

The fine work style of Young Pioneers counsellors exerts an imperceptible influence on children s thinking and behaviour.

Effects of different crop rotation system on the characteristics of soil weed seedbank;

The 10 year experiment results of crop rotation improving soil fertility show as follows, the bean family brought into crop rotation might improve soil fertility obviously, soil fertility after bean harvesting was higher than after wheat harvesting, the accumulation effects of improving soil fertility after bean harvesting is obvious.

How to evaluate crop rotation level in large geographic area is one of the most important problems in agricultural production.

Data of a field experiment carried out at Zhangye Oasis,an arid region of northwest China,were used to evaluate the evapotranspiration during the 2004 growing seasons of an intercropping field of spring wheat and summer maize.