Therefore analyzing the characteristics of northern in-vehicle air pollutants and studying the purification measures of in-vehicle air pollutions,will be useful to put forward the purification measures.

The chronic filariasis cases from 49 cases before filariasis elimination dropped to 6 cases and no new chronic filariasis case was found until now.

Based on the agent theory in the western economics,the management mechanism and corresponding guarantee system have been established,which set risk agreement as the frame and control the whole process of chemical measures.

Based on the drawbacks of present phytoremediation,a review with 44 references is given on the latest research progress in strengthening measures at home and abroad mainly through the following three aspects:the traits of the hyperaccumu.

The production to add the titanium concentrate form New Zealand in Sintering Plant of Chengde Iron and Steel Company is concluded as well as the influence of the concentrate on the output of agglomerate and the strengthening measures adopted to increase the output.

Facing the problem of short effective time of hydraulic fracturing and chemical broken down in polymer injection wells,this paper analyzes the geologic status and dynamic and static data of 92 chemical broken down wells operated in 2000 and 2001 in 10 polymer flooded blocks, constructs a set of technique for diagnosis and stimulation optimization for polymer injection wells plug.

In order to enhance the people\'s shopping enthusiasm in underground space and increase their comfort and jollity,a series of optimization measures for improving the underground interior environment have been put forward with reference to some overseas project examples.

The optimization measures of structural design of the gravity waste dam are put forward.