The present state of water quality of Caobang reservoir was analyzed and assessed on the basis of the results from monitoring the present state of reservoir.

Taking Balin Right Banner of Inner Mongolia as an example,the author detailedly analysed several kinds of methods that chiefly adopted in the desertification prevention and control at present of northern semiarid grasslands in China,such as enclosure to prevent grazing,emigrant or immigrant for ecology,raising in enclosure and the small grass enclosed pasture.

The Application Example of Inventor API——the Establishment of the Sketch Bank for the Section of the Conventional Shape Steel;