The present problem of mining of narrow and gentle dip vein was analyzed. A new technique of rapidly following curtain filling was put forward. The results show that the new technique is feasible, has the characterist...The present problem of mining of narrow and gentle dip vein was analyzed. A new technique of rapidly following curtain filling was put forward. The results show that the new technique is feasible, has the characteristic to make the whole curtain wall filter, makes relative density of the filling tailings slurry reach saturation of 78.0% 80.0% in 25 min, and keeps the roof of mined out space stable in 60 min. The new technique of the rapidly following curtain filling has solved the difficult problem of the filling body filtering slowly and promptly controlling underground pressure, which cannot be solved in traditional ways.展开更多
Code-switching is a socio-linguistic term,which refers to the switching from one language to another.This paper attempts to show that code-switching can be used as a teaching strategy for second language teaching by i...Code-switching is a socio-linguistic term,which refers to the switching from one language to another.This paper attempts to show that code-switching can be used as a teaching strategy for second language teaching by illustrating the possible reasons for the switching.It also explores the possibility of viewing code-switching as language interferenve from a teaching perspective.In accordance with these analysis this paper makes a conclusion that when code-switching is to compensate for a language cifficulty it may be viewed as interfernce and when it is used as a socio-linguistic tool it becomes a strategy.展开更多
文摘The present problem of mining of narrow and gentle dip vein was analyzed. A new technique of rapidly following curtain filling was put forward. The results show that the new technique is feasible, has the characteristic to make the whole curtain wall filter, makes relative density of the filling tailings slurry reach saturation of 78.0% 80.0% in 25 min, and keeps the roof of mined out space stable in 60 min. The new technique of the rapidly following curtain filling has solved the difficult problem of the filling body filtering slowly and promptly controlling underground pressure, which cannot be solved in traditional ways.
文摘Code-switching is a socio-linguistic term,which refers to the switching from one language to another.This paper attempts to show that code-switching can be used as a teaching strategy for second language teaching by illustrating the possible reasons for the switching.It also explores the possibility of viewing code-switching as language interferenve from a teaching perspective.In accordance with these analysis this paper makes a conclusion that when code-switching is to compensate for a language cifficulty it may be viewed as interfernce and when it is used as a socio-linguistic tool it becomes a strategy.
