Burg jl , perelman d , kasper lh , et al . molecular analysis of the gene encoding the major surface antigen fo toxoplasma gondii j . j immunol , 1988 , 141 : 3584 陈晓光，江静波.应用聚合酶链反应技术建立弓形虫表面抗原基因的克隆与测定j .中国寄生虫学与寄生虫病杂志， 1994 ， 12 ( 2 ) ： 129
4.
But on the other hand , strategies training can make up for the lack of language level . ( kasper 1983 , tarone 1983 , chen siqing 1992 ) . with the conviction that strategic competence and grammatical competence influence each other , this study employs an experimental design to compare two different kinds of training methods - explicit training and implicit training to find out some effective ways of improving the communication strategy competence of chinese middle school students . the independent variable of the experiment is different training method , while the dependent variable is the subjects " communicative strategy competence 交际策略是学习者在对第二语言或外语掌握有限的情况下，为达到交际目的，弥补其语法或词汇知识的缺乏而采用的方法( paribakht1985 ， corder1983 ， faerch & kasper1983 ) ，从前人的研究中可以看出交际策略的运用一方面受到语言水平的影响( tarone1973 ， eillis1983 ， bialystok1983 ) ) ，即语言水平的高低会影响策略选用的类型和效果，而另一方面，策略能力的培养和发展又可弥补语言水平的不足，即有助于语言水平的提高( kasper1983 ， tarone1980 ，陈思箐1992 ) 。
